  # Percentage Change

In this worksheet, students work out percentage changes. Key stage:  KS 3

Curriculum topic:   Number

Curriculum subtopic:   Define, Interpret and Compare Percentages

Difficulty level:   #### Worksheet Overview

This worksheet is about finding the percentage change.

Example 1

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

Find the percentage increase in its length.

Actual increase = 2.01 - 2 = 0.01m .

Percentage increase =
 actual increase original length
×100
=
 0.01 2
×100 = 0.5%

Example 2

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

Find the percentage decrease in her weight.

Actual decrease = 80 - 63 = 17kg.

Percentage decrease =
 actual decrease original weight
×100
=
 17 80
×100 = 21.25%

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