5.6: Introducing Percent

Reading & Writing Percents

To write a percent:

  • Write the number in the usual way
  • Place the percent sign after the numerals
    • [latex]50\%[/latex]
    • [latex]5\frac{1}{2}\%[/latex] or [latex]5.5\%[/latex]
    • [latex]\frac{3}{4}\%[/latex] or [latex]0.75\%[/latex]

To read a percent:

  • Read the numbers in the usual way.
  • Say “percent” after the number.
    • [latex]16\%[/latex] — say, “sixteen percent”
    • [latex]4\frac{1}{2}\%[/latex] — say, “four and one-half percent”
    • [latex]0.25\%[/latex] — say, “twenty-five hundredths percent,” or, “one-quarter percent,” or, “point two five percent”

 

Exercise 1

Write these percents using numerals and a percent sign. Note that the mixed numbers may be expressed with common fractions or decimals.

Example:     Thirty-four percent — [latex]34\%[/latex]

 

  1. Twelve percent
  2. Four-fifths percent
  3. One hundred sixteen and three-tenths percent
  4. Thirteen percent
  5. Six and one-fifth percent
  6. Ninety-four and one-half percent

Exercise 1 Answers

  1. [latex]12\%[/latex]
  2. [latex]0.8\%[/latex] or [latex]\dfrac{4}{5}\%[/latex]
  3. [latex]116.3\%[/latex] or [latex]116\dfrac{3}{10}\%[/latex]
  4. [latex]13\%[/latex]
  5. [latex]6.2\%[/latex] or [latex]6\dfrac{1}{5}\%[/latex]
  6. [latex]94.5\%[/latex] or [latex]94\dfrac{1}{2}\%[/latex]

Exercise 2

Write the percent as you would read it.

Example:     [latex]62\%[/latex] — sixty-two percent

 

  1. [latex]37\dfrac{1}{2}\%[/latex]
  2. [latex]202\%[/latex]
  3. [latex]\dfrac{3}{4}\%[/latex]
  4. [latex]18.3\%[/latex]
  5. [latex]14\dfrac{1}{2}\%[/latex]
  6. [latex]100\dfrac{1}{2}\%[/latex]

Exercise 2 Answers

  1. Thirty-seven and one-half percent
  2. Two hundred two percent
  3. Three-quarters percent
  4. Eighteen and three-tenths percent
  5. Five-tenths percent or one-half percent or zero point five percent
  6. One hundred percent

Changing Decimals to Percents

Writing equivalent fractions is an important math skill.

Equivalent common fractions, decimals, and percents all represent the same amount (see Table 5.6.1).

Table 5.6.1: Equivalent Fractions, Decimals, and Percentages
Fractions Decimals Percentages
[latex]\dfrac{1}{2}[/latex] [latex]0.5[/latex] [latex]50\%[/latex]
[latex]\dfrac{3}{10}[/latex] [latex]0.3[/latex] [latex]30\%[/latex]

You need the skill of writing equivalent fractions for working with percents.

To change any number to a percent, multiply the number by 100% and place a percent sign % after the product.

Remember this shortcut for multiplying by 100?

[latex]4.27\times100=427[/latex]
[latex]0.287\times100=28.7[/latex]
[latex]53\times100=5300[/latex]

The shortcut is:

When multiplying by 100, move the decimal point two places to the right.

Example A

Change these numbers to a percent.

[latex]\begin{equation}\begin{split} &1 \ \ \ \ \ \ \ \ &1\times100\% \ \ \ \ &= \ \ \ \ &100\% \\ &0.25 \ \ \ \ \ \ \ &0.25\times100\% \ \ \ \ &= \ \ \ \ &25\% \\ &0.8 \ \ \ \ \ \ \ &0.8\times100\% \ \ \ \ &= \ \ \ \ &80\% \\ &0.375 \ \ \ \ \ \ \ &0.375\times100\% \ \ \ \ &= \ \ \ \ &37.5\% \\ \end{split}\end{equation}[/latex]

So:

To change a decimal to a percent, move the decimal point two places to the right and then write the percent sign after the number.

Example B

Change each decimal to a percent.

[latex]\begin{equation}\begin{split} &\curvearrowright \\ 0.125=0&.125=12.5\% \end{split}\end{equation}[/latex]

[latex]\begin{equation}\begin{split} &\curvearrowright \\ 1.375=1&.375=137.5\% \end{split}\end{equation}[/latex]

If the decimal point moves to the end of the number, it is not necessary to write the decimal point.

Remember: Zeros at the beginning of a number are also not necessary.

[latex]\begin{equation}\begin{split} &\curvearrowright \\ 0.05=0&.05=\cancel{0.0}5\%=5\% \end{split}\end{equation}[/latex]

If the decimal is a tenth (one decimal place), it will be necessary to add a zero. If you are changing a whole number to a percent, add two zeros.

[latex]\begin{equation}\begin{split} &\curvearrowright \\ 0.4=0&.40=40\% \end{split}\end{equation}[/latex]

[latex]\begin{equation}\begin{split} &\curvearrowright \\ 1.7=1&.70=170\% \end{split}\end{equation}[/latex]

[latex]\begin{equation}\begin{split} &\curvearrowright \\ 2=2&.00=200\% \end{split}\end{equation}[/latex]

 

Exercise 3

Change these decimals to percents.

Example:     [latex]\begin{equation}\begin{split} &\curvearrowright \\ 0.75=0&.75=75\% \end{split}\end{equation}[/latex]

 

  1. 0.33
  2. 0.1
  3. 0.0025
  4. 0.9
  5. 0.325
  6. 0.0625
  7. 3

Exercise 3 Answers

  1. 33%
  2. 10%
  3. 0.25%
  4. 90%
  5. 32.5%
  6. 6.25%
  7. 300%

Changing Percents to Decimals

Review dividing by 100:

[latex]47.39\div 100=0.4739[/latex]
[latex]429\div 100=4.29[/latex]
[latex]3.824\div 100=0.03824[/latex]

To divide by 100, move the decimal point two places to the left.

Example C

Change each percent to a decimal or mixed number.

[latex]\begin{equation}\begin{split} 58\% \ \ &= \ \ 58\div100 \ \ &= \ \ .58 \ \ &= \ \ 0.58 \\ 20\% \ \ &= \ \ 20\div100 \ \ &= \ \ .2 \ \ &= \ \ 0.2 \\ 6\% \ \ &= \ \ 6\div100 \ \ &= \ \ .06 \ \ &= \ \ 0.06 \\ 110\% \ \ &= \ \ 110\div100 \ \ &= \ \ 1.10 \end{split}\end{equation}[/latex]

So:

To change a percent to a decimal, divide by 100 (move the decimal point two places to the left) and remove the percent sign.

Example D

Change each percent to a decimal.

[latex]\begin{equation}\begin{split} 75\% \ \ &= \ \ 75.0\% \ \ &= \ \ 0.75 \\ 12\% \ \ &= \ \ 12.0\% \ \ &= \ \ 0.12 \\ 37.5\% \ \ &= \ \ 37.5\% \ \ &= \ \ 0.375 \\ 125\% \ \ &= \ \ 125.0\% \ \ &= \ \ 1.25 \\ 5\% \ \ &= \ \ 5.0\% \ \ &= \ \ 0.05 \\ 4.6\% \ \ &= \ \ 4.6\% \ \ &= \ \ 0.046 \\ \end{split}\end{equation}[/latex]

If there is no decimal point in the percent, place the decimal point after the last numeral and then divide by 100.

[latex]24\%=24.0\%=0.24[/latex]

It may be necessary to prefix zeros. (This means adding zeros in front of the number if needed).

[latex]6\%=6.0\%=0.06[/latex]

A zero at the right of a decimal is not needed and may be left off.

[latex]40\%=40.0\%=0.40=0.4[/latex]

Exercise 4

Change each percent to its decimal equivalent.

Example:     [latex]\begin{equation}\begin{split} &\curvearrowleft \\ 23\% = & 23.=0.23\% \end{split}\end{equation}[/latex]

 

  1. 1%
  2. 112%
  3. 10.3%
  4. 36%
  5. 147%

Exercise 4 Answers

  1. [latex]0.01[/latex]
  2. [latex]1.12[/latex]
  3. [latex]0.103[/latex]
  4. [latex]0.36[/latex]
  5. [latex]1.47[/latex]

To change a percent containing a common fraction to a decimal:

  1. Change the common fraction in the percent to a decimal in the percent.
  2. Divide by 100 (move the decimal 2 places to the left).

Example E

[latex]\begin{equation}\begin{split} 3\dfrac{1}{2}\% \ \ &= \ \ 3.5\% \ \ \ \ \ \ \ &3.5\% &\div 100 \ &= .035 &= 0.035 \\ 37\dfrac{1}{2}\% \ \ &= \ \ 37.5\% \ \ \ \ \ \ \ &37.5\% &\div 100 \ &= .375 &= 0.375 \\ \dfrac{1}{4}\% \ \ &= \ \ 0.25\% \ \ \ \ \ \ \ &0.25\% &\div 100 \ &= .0025 \\ 17\dfrac{1}{3}\% \ \ &= \ \ 17.\overline{3}\% \ \ \ \ \ \ \ &17.\overline{3}\% &\div 100 \ &= 0.17\overline{3} \end{split}\end{equation}[/latex]

Exercise 5

Change each percent to its decimal equivalent.

Example:     [latex]8\dfrac{4}{5}\%= \ \ \ \ \ 8.8\%=0.088[/latex]

 

  1. [latex]4\dfrac{1}{2}\%=[/latex]
  2. [latex]56\dfrac{3}{4}\%=[/latex]
  3. [latex]1\dfrac{3}{5}\%=[/latex]
  4. [latex]112\dfrac{1}{2}\%=[/latex]
  5. [latex]2\dfrac{3}{8}\%=[/latex]
  6. [latex]5\dfrac{1}{4}\%=[/latex]

Exercise 5 Answers

  1. [latex]0.045[/latex]
  2. [latex]0.5675[/latex]
  3. [latex]0.016[/latex]
  4. [latex]1.125[/latex]
  5. [latex]0.02375[/latex]
  6. [latex]0.0525[/latex]

Changing Common Fractions to Percents

To change any number to a percent, multiply the number by 100% and place the percent sign % after the product.

There are two methods you can use to change a common fraction to a percent.

Method 1

To change a common fraction to an equivalent percent, multiply the common fraction by 100%.

Example F

Change these common fractions to an equivalent percent:

  1. [latex]\dfrac{3}{4} = \text{_____}\%[/latex]
  2. [latex]1\dfrac{1}{5} = \text{_____}\%[/latex]

 

a. [latex]\boldsymbol{\dfrac{3}{4} = \text{_____}\%}[/latex]

Step 1: Multiply by 100%.

[latex]\dfrac{3}{4} \times 100\%[/latex]

Step 2: Convert 100% to a fraction.

[latex]\dfrac{3}{4} \times \dfrac{100}{1}\%[/latex]

Step 3: Simplify the fractions by dividing the numerator and denominator by 4.

[latex]\dfrac{3}{\cancel{4}1} \times \dfrac{\cancel{100}25}{1}\%[/latex]

Step 4: The 4 cancels and 100 is reduced to 25.

[latex]\dfrac{3}{1} \times \dfrac{25}{1}\%[/latex]

Step 5: Multiply 3 by 25%.

[latex]3 \times 25\%[/latex]

[latex]75\%[/latex]

 

b. [latex]\boldsymbol{1\dfrac{1}{5} = \text{_____}\%}[/latex]

Step 1: Convert number to a fraction.

[latex]\dfrac{6}{5}[/latex]

Step 2: Multiply by 100%.

[latex]\dfrac{6}{5} \times 100\%[/latex]

Step 3: Convert 100% to a fraction.

[latex]\dfrac{6}{5} \times \dfrac{100}{1}\%[/latex]

Step 4: Simplify the fractions by dividing the denominator and numerator by 5.

[latex]\dfrac{6}{\cancel{5}1} \times \dfrac{\cancel{100}20}{1}\%[/latex]

Step 5: The 5 cancels and 100 is reduced to 20.

[latex]\dfrac{6}{1} \times \dfrac{20}{1}\%[/latex]

Step 6: Multiply 6 by 20%.

[latex]6 \times 20\%[/latex]

[latex]120\%[/latex]

Exercise 6

Multiply by 100% to change each common fraction to an equivalent percent.

Example:     [latex]\dfrac{4}{5} \ \ \ \ \ \ \ \ \ \ \dfrac{4}{5}\times100\%=80\%[/latex]

 

  1. [latex]\dfrac{1}{5}\%=[/latex]
  2. [latex]\dfrac{9}{10}\%=[/latex]
  3. [latex]1\dfrac{1}{2}\%=[/latex]
  4. [latex]\dfrac{7}{10}\%=[/latex]
  5. [latex]3\dfrac{3}{4}\%=[/latex]
  6. [latex]\dfrac{1}{2}\%=[/latex]

Exercise 6 Answers

  1. [latex]20\%[/latex]
  2. [latex]90\%[/latex]
  3. [latex]150\%[/latex]
  4. [latex]70\%[/latex]
  5. [latex]375\%[/latex]
  6. [latex]50\%[/latex]

Method 2

To change a common fraction to an equivalent percent, first write the common fraction as a decimal. Then, multiply the decimal by 100% (move the decimal point two places to the right).

Example G

[latex]\dfrac{3}{8}=\text{_____}\%[/latex]

Step 1: Use long division to write the fraction as a decimal.

[latex]\dfrac{3}{8}=0.375[/latex]

Step 2: Move the decimal two spots to the right.

[latex]\begin{equation}\begin{split}&\curvearrowright \\ 0&.375=37.5\end{split}\end{equation}[/latex]

[latex]37.5\%[/latex]

Example H

Convert [latex]\dfrac{3}{8}[/latex] to a percentage.

Step 1:

[latex]\begin{array}{r}0.375 \\ 8\enclose{longdiv}{3.000} \\ -24 \\ \hline 6\,0 \\ -56 \\ \hline 4\,0 \end{array}[/latex]

[latex]\dfrac{3}{8} = 0.375[/latex]

Step 2: Move the decimal point two places to the right and add the percent sign.

[latex]0.375 = 37.5%[/latex]

Example I

Convert [latex]\dfrac{1}{3}[/latex] to a percentage.

Step 1: Use long division to write fraction as a decimal.

[latex]\begin{array}{r}0.33\overline{3} \\ 3\enclose{longdiv}{1.000}\end{array}[/latex]

[latex]\dfrac{1}{3} = 0.33\overline{3}[/latex]

Step 2: Move the decimal point two places to the right and add the percent sign.

[latex]0.33\overline{3}=33.\overline{3}% \text{ also written as } 33\dfrac{1}{3}%[/latex]

Example J

Convert [latex]\dfrac{11}{12}[/latex] to a percentage.

Step 1: Use long division to write fraction as a decimal.

[latex]\begin{array}{l}\hspace{0.9cm}0.916\bar{6}\\12 \enclose{longdiv}{11.000}\\\hspace{0.4cm}-10\,8\downarrow\\\hline\hspace{1.2cm}2\,\mathbf{0}\\\hspace{0.9cm}-12\downarrow\\\hline\hspace{1.4cm}8\,\mathbf{0} \\\hspace{1.2cm}-72  \\\hline\hspace{1.6cm}8 \end{array}[/latex]

[latex]\dfrac{11}{12} = 0.91\overline{6}[/latex]

Step 2: Move the decimal point two places to the right and add the percent sign.

[latex]0.916\overline{6} = 91.\overline{6}%[/latex]

Exercise 7

Convert the following fractions to percentages.

Example:     [latex]\dfrac{1}{12}=0.08\overline{3} \ \ \ \ \ \ 0.08\overline{3}\times100\%=8.\overline{3}\%[/latex]

 

  1. [latex]\dfrac{1}{8}[/latex]
  2. [latex]\dfrac{5}{8}[/latex]
  3. [latex]\dfrac{7}{8}[/latex]
  4. [latex]\dfrac{2}{3}[/latex]
  5. [latex]\dfrac{5}{16}[/latex]
  6. [latex]\dfrac{5}{6}[/latex]
  7. [latex]\dfrac{4}{9}[/latex]

Exercise 7 Answers

  1. [latex]12.5\%[/latex]
  2. [latex]62.5\%[/latex]
  3. [latex]87.5\%[/latex]
  4. [latex]66.\overline{6}\%[/latex]
  5. [latex]31.25\%[/latex]
  6. [latex]83.\overline{3}\%[/latex]
  7. [latex]44.\overline{4}\%[/latex]

The method you use to change a common fraction to a percent will depend on the numbers you are working with. Choose whichever method seems easier for the situation. You will also memorize many equivalencies as you work with them. But you should definitely memorize:

  • [latex]\dfrac{1}{3}=33\dfrac{1}{3}\%[/latex]
  • [latex]\dfrac{2}{3}=66\dfrac{2}{3}\%[/latex]

Changing Percents to Common Fractions

You know that percents are a form of fraction with an unwritten denominator of 100. A % sign is used.

To change any percent to a decimal, common fraction, or mixed number, divide by 100 and remove the percent sign.

To change a percent to a common fraction:

  1. Write the numerals in the percent as the numerator.
  2. Write 100 as the denominator.
    • Remember: The line in a fraction can be a division sign, so [latex]58\%=\dfrac{58}{100}[/latex] is the same as [latex]58\div100[/latex].)
  3. Remove the % sign.
  4. Simplify the fraction: [latex]\dfrac{58}{100}=\dfrac{29}{50}[/latex]

Example K

Write each percent as a common fraction.

  1. [latex]38\%=\dfrac{38}{100}\div\left(\dfrac{2}{2}\right)= \dfrac{38 \div 2}{100 \div 2} =\dfrac{19}{50}[/latex]
  2. [latex]25\%=\dfrac{25}{100}\div\left(\dfrac{25}{25}\right)= \dfrac{25 \div 25 }{100 \div 25}=\dfrac{1}{4}[/latex]
  3. [latex]3\%=\dfrac{3}{100}[/latex]

Note: Percents greater than or equal to 100 become improper fractions which will be rewritten as mixed numbers.

[latex]110\%=\dfrac{110}{100}=1\dfrac{10}{100}=1\dfrac{1}{10}[/latex]
A long division equation showing that 110 divided by 100 is 1 with 10 remaining.

[latex]120\%=\dfrac{120}{100}=1\dfrac{20}{100}=1\dfrac{1}{5}[/latex]
A long division equation showing that 120 divided by 100 is 1 with 20 remaining.

Remember: 100% is the whole thing [latex]100\% = 1[/latex].

Exercise 8

Change each percent to a common fraction. Simplify to the lowest terms.

  1. [latex]31\%=[/latex]
  2. [latex]11\%=[/latex]
  3. [latex]2\%=[/latex]
  4. [latex]20\%=[/latex]
  5. [latex]75\%=[/latex]
  6. [latex]100\%=[/latex]
  7. [latex]750\%=[/latex]

Exercise 8 Answers

  1. [latex]\dfrac{31}{100}[/latex]
  2. [latex]\dfrac{11}{100}[/latex]
  3. [latex]\dfrac{1}{50}[/latex]
  4. [latex]\dfrac{1}{5}[/latex]
  5. [latex]\dfrac{3}{4}[/latex]
  6. [latex]1[/latex]
  7. [latex]7\dfrac{1}{2}[/latex]

Percents Less Than 1%

Sometimes, a percent smaller than 1% is used.

For example, you will hear amounts such as [latex]\tfrac{1}{4}\%[/latex] or [latex]\tfrac{1}{8}\%[/latex] or [latex]\tfrac{1}{2}\%[/latex] on the news about the Bank of Canada rate and the rise and fall of inflation.

These are small amounts. Sometimes, the expression “[latex]\tfrac{1}{2}\text{ of a percentage point}[/latex]” is used instead of “[latex]\tfrac{1}{2}\%[/latex]”.

What is [latex]\dfrac{1}{4}\%[/latex]?

[latex]\dfrac{1}{4}\%[/latex] is [latex]\dfrac{1}{4}\text{ of }1\%[/latex]

[latex]1\%=\dfrac{1}{100}[/latex], so [latex]\dfrac{1}{4}\text{ of }1\%=\dfrac{1}{4}\times\dfrac{1}{100}=\dfrac{1}{400}[/latex]

[latex]\dfrac{1}{4}\%=0.25\%=0.0025[/latex]

 

What is [latex]\dfrac{1}{2}\%[/latex]

[latex]\dfrac{1}{2}\%=\dfrac{1}{2}\text{ of }1\%=\dfrac{1}{2}\times\dfrac{1}{100}=\dfrac{1}{200}[/latex]

[latex]\dfrac{1}{2}\%=0.5\%=0.005[/latex]

To work with percents less than 1%, change the percent to a decimal by dividing by 100 (move the decimal point two places to the left).

[latex]0.2\%=0.002[/latex]

[latex]0.75\%=0.0075[/latex]

 

If the percent is expressed as a common fraction:

  • Write the common fraction percent as a decimal percent.
  • Divide by 100 (move the decimal point two places left).

Exercise 9

Change each percent to an equivalent decimal.

  1. [latex]\dfrac{1}{2}\%=[/latex]
  2. [latex]0.6\%=[/latex]
  3. [latex]\dfrac{3}{10}\%=[/latex]
  4. [latex]\dfrac{3}{5}\%=[/latex]
  5. [latex]0.75\%=[/latex]
  6. [latex]\dfrac{3}{4}\%=[/latex]
  7. [latex]0.5\%=[/latex]
  8. [latex]\dfrac{1}{4}\%=[/latex]
  9. [latex]0.125\%=[/latex]
  10. [latex]\dfrac{5}{8}\%=[/latex]

Exercise 9 Answers

  1. [latex]0.005[/latex]
  2. [latex]0.006[/latex]
  3. [latex]0.003[/latex]
  4. [latex]0.006[/latex]
  5. [latex]0.0075[/latex]
  6. [latex]0.0075[/latex]
  7. [latex]0.005[/latex]
  8. [latex]0.0025[/latex]
  9. [latex]0.00125[/latex]
  10. [latex]0.00625[/latex]

16⅔%, 33⅓%, 66⅔%, 83⅓% …

These percents will become repeating decimals. For example:

[latex]\begin{equation}\begin{split} 33\dfrac{1}{3}\% &= 33.\overline{3}\% &= 0.33\overline{3} \\ \\ 66\dfrac{2}{3}\% &= 66.\overline{6}\% &= 0.66\overline{6} \end{split}\end{equation}[/latex]

It is usually more convenient to use the common fraction equivalent of these percents. Memorize them, or make a note on a special paper and post it near your workspace.

[latex]\begin{equation}\begin{split} 33\dfrac{1}{3}\% &= 33\dfrac{1}{3}\div100 &= \dfrac{100}{3}\times\dfrac{1}{100} \ &= \dfrac{1}{3} \\ \\ 66\dfrac{2}{3}\% &= 66\dfrac{2}{3}\div100 &= \dfrac{200}{3}\times\dfrac{1}{100} \ &= \dfrac{2}{3} \end{split}\end{equation}[/latex]

[latex]\begin{equation}\begin{split} 16\dfrac{2}{3}\% &= \dfrac{1}{6} \\ \\ 33\dfrac{1}{3}\% &= \dfrac{1}{3} \\ \\ 66\dfrac{2}{3}\% &= \dfrac{2}{3} \\ \\ 83\dfrac{1}{3}\% &= \dfrac{5}{6} \end{split}\end{equation}[/latex]

Review of Equivalent Common Fractions, Decimals, & Percents

Exercise 10

Complete the chart in Table 5.6.4. These are equivalents that you will often use, so use this chart for reference. Memorize as many equivalents as you can. You may wish to put other equivalents on the chart.

Table 5.6.4: Exercise 10 Complete the chart
Common Fraction Decimal Percent
[latex]\dfrac{1}{4}[/latex] — —
— [latex]0.5[/latex] —
— — [latex]75\%[/latex]
[latex]\dfrac{1}{8}[/latex] — —
— [latex]0.375[/latex] —
— — [latex]62.5\%[/latex]

Exercise 10 Answers

Table 5.6.5: Exercise 10 Answers
Common Fraction Decimal Percent
[latex]\dfrac{1}{4}[/latex] [latex]0.25[/latex] [latex]25\%[/latex]
      [latex]\dfrac{1}{2}[/latex] [latex]0.5[/latex] [latex]50\%[/latex]
[latex]\dfrac{3}{4}[/latex] [latex]0.75[/latex] [latex]75\%[/latex]
[latex]\dfrac{1}{8}[/latex] [latex]0.125[/latex] [latex]12.5\%[/latex]
[latex]\dfrac{3}{8}[/latex] [latex]0.375[/latex] [latex]37.5\%[/latex]
[latex]\dfrac{5}{8}[/latex] [latex]0.625[/latex] [latex]62.5\%[/latex]

5.6: Practice Questions

  1. Write these percents in numeral form.
    1. Sixty-two and one-half percent
    2. One hundred six and one-fifth percent

     

  2. Write these percents in words.
    1. [latex]72\%[/latex]
    2. [latex]\dfrac{3}{4}\%[/latex]

     

  3. Change these percents to decimal fractions.
    1. [latex]32\%[/latex]
    2. [latex]18.5\%[/latex]
    3. [latex]125\%[/latex]
    4. [latex]\dfrac{4}{5}\%[/latex]
    5. [latex]\dfrac{2}{3}\%[/latex]

     

  4. Change these percents to common fractions in the lowest terms.
    1. [latex]16\%[/latex]
    2. [latex]20\%[/latex]
    3. [latex]106\%[/latex]
    4. [latex]75\%[/latex]

     

  5. Change these common fractions to equivalent percents.
    1. [latex]\dfrac{4}{5}[/latex]
    2. [latex]\dfrac{3}{8}[/latex]

5.6: Practice Question Answers

  1. Write these percents in numeral form.
    1. [latex]62.5\%[/latex] or [latex]62\dfrac{1}{2}\%[/latex]
    2. [latex]106.2\%[/latex] or [latex]106\dfrac{1}{5}\%[/latex]

     

  2. Write these percents in words.
    1. Seventy-two percent
    2. Three-quarters percent

     

  3. Change these percents to decimal fractions.
    1. [latex]0.32[/latex]
    2. [latex]0.185[/latex]
    3. [latex]1.25[/latex]
    4. [latex]0.008[/latex]
    5. [latex]0.00\overline{6}[/latex]

     

  4. Change these percents to common fractions in the lowest terms.
    1. [latex]\dfrac{4}{25}[/latex]
    2. [latex]\dfrac{1}{5}[/latex]
    3. [latex]1\dfrac{3}{50}[/latex]
    4. [latex]\dfrac{3}{4}[/latex]

     

  5. Change these common fractions to equivalent percents.
    1. [latex]80\%[/latex]
    2. [latex]37.5\%[/latex]

Attribution

This chapter has been adapted from Topic A: Introducing Percent in Adult Literacy Fundamental Mathematics: Book 6 – 2nd Edition (BCcampus) by Liz Girard and Wendy Tagami (2022), which is under a CC BY 4.0 license.

License

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Intermediate PreAlgebra: Building Success Copyright © 2024 by Kim Tamblyn, TRU Open Press is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License, except where otherwise noted.

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