CheerMath

Grade 8 Percents Practice

Work with Harder Percents and Percent Change

Take on harder percents! Work with decimal, very small and greater-than-100% percents, then calculate and compare percent increase and decrease.

Also known as Class 8 maths — the same topics, whether your school calls it grade, class or year.

Sign up for free

Sample questions

A few samples from this topic — try one, then show the answer.

  1. Calculate Percent Increase and Decrease

    A salary rises from 250 to 375. What is the percent increase?
    • 500%
    • 50%
    • 51%
    • 150%
    Show answer
    Answer:
    50%

  2. Choose and Check Percent-Change Calculations

    Which expression correctly represents the percent change from 60 to 51?
    • 951  ×  100\frac{9}{51} \; \times \; 100
    • 5160  ×  100\frac{51}{60} \; \times \; 100
    • 609  ×  100\frac{60}{9} \; \times \; 100
    • 960  ×  100\frac{9}{60} \; \times \; 100
    Show answer
    Answer:
    960  ×  100\frac{9}{60} \; \times \; 100

  3. Choose and Check Percent-Change Calculations

    A number changes from 120 to 168. What is the percent change?
    Show answer
    Answer:
    40

Want more like these? Try a round — no sign-up

A worked example

A salary rises from 250 to 375. What is the percent increase?
  1. Find the amount of change by subtracting the two values.\\375  −  \; - \;250  =  \; = \;125
  2. Divide by the original value to see what fraction of the original changed.125250  =  0.5\\ \frac{125}{250} \; = \; 0.5
  3. Multiply by 100 to convert to a percent.0.5  ×  \\ 0.5 \; \times \;100  =  50%\; = \; 50\%
  4. The percent increase is 50%50\%.

More Grade 8 topics