Grade 7 Percents Practice

Find Parts, Percents, and Wholes

Find the missing piece! Work with percents above 100%, find what percent one number is of another, find the whole from a part, and handle discounts and sales tax.

Also known as Class 7 maths — the same topics, whether your school calls it grade, class or year.

Sample questions

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

Find Percents of Numbers Above 100%

Calculate $60\%$ of 38.
- 228
- 34.2
- 11.4
- 22.8
Show answer
Answer:
22.8
Find What Percent One Number Is of Another

If $15\%$ of a number is 72, what is the number?
- 480
- 1080
- 4.8
- 10.8
Show answer
Answer:
480
Find the Amount of Increase or Decrease

A tank had 150 litres of water and now has 127.5 litres. What is the percent decrease?

Show answer
Answer:
15

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A worked example

Calculate

60\%

of 38.

We need to find 60% of 38.
Percent means $\textit{out of 100}$ , so divide by 100 to convert to a decimal. $\\ 60\% = \frac{60}{100} =$ 0.6
Multiply the decimal by the number to find the result. $\\$ 0.6 $\; \times \;$ 38 $\; = \;$ 22.8
The correct answer is 22.8.
Check each option: $\\$ 22.8 $\to$ 0.6 $\times$ 38=22.8 $\; \checkmark \\$ 228 $\to$ This comes from dividing by 10 instead of 100. $\;$ ✘ $\\$ 34.2 $\to$ 0.6 $\times$ 38 $\neq$ 34.2. $\;$ ✘ $\\$ 11.4 $\to$ This is half the correct answer. $\;$ ✘

Skills covered

Convert More Fractions, Decimals, and Percents
Compare and Order Percents in Different Forms
Find Percents of Numbers Above 100%
Find What Percent One Number Is of Another
Solve What-Percent Word Problems
Find the Whole from a Percent and Part
Solve Find-the-Whole Word Problems
Find the Amount of Increase or Decrease
Find a New Value After a Percent Change
Find Discounts and Sale Prices
Find Sales Tax and Total Price

Percents in other grades

For parents & teachers

Your child reviews the conversions and then works in every direction — finding what percent one number is of another, recovering the whole from a percent and a part, calculating increases and decreases, and meeting discounts and sales tax for the first time.

Parts, percents and wholes: reviewing fraction, decimal and percent conversions then extending them to harder cases including percents needing simplification and percent-to-decimal word problems, comparing and ordering percents in all three forms at the next level, percents of numbers above 100%, determining what percent one number is of another, recovering the whole from a percent and a part with matching word problems, the amount of an increase or decrease and the resulting new value, discounts and sale prices, and sales tax and total price.

Grade 7 Percents Practice

Sample questions

A worked example

More Grade 7 topics