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Calculate the Percentage Change

In this worksheet, students will work out percentage changes.

'Calculate the Percentage Change' worksheet

Key stage:  KS 3

Year:  Year 9 Maths worksheets

Curriculum topic:   Number

Curriculum subtopic:   Interpret Fractions/Percentages as Operators

Difficulty level:  

Worksheet Overview

This activity is about finding percentage change.


Example 1

A metal bar increases its length from 2 m to 2.01 m after heating.

Find the percentage increase in its length.

Actual increase = 2.01 - 2 = 0.01 m

Percentage increase = (actual increase ÷ original length) x 100 = (0.01 ÷ 2) x 100 = 0.5%

Example 2

A woman reduced her weight from 80 kg to 63 kg after dieting.

Find the percentage decrease in her weight.

Actual decrease = 80 - 63 = 17 kg.

Percentage decrease = (actual decrease ÷ original weight) x 100 = (17 ÷ 80) x 100 = 21.25


bathroom scales


Just remember the formula for percentage change = (actual change ÷ original) x 100 


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