# Calculate Percentage Change Problems

In this worksheet, students will solve real life problems using percentages. A calculator will be used.

Key stage:  KS 3

Curriculum topic:   Number

Curriculum subtopic:   Define, Interpret and Compare Percentages

Difficulty level:

#### Worksheet Overview

This activity is about using the knowledge we have of percentages to answer real world problems.

You will need a calculator for this.

Percentages are used a lot in our everyday life. From discounts in shop sales to interest in a bank and everything in between!

Let's look at an example of this before we try some questions.

Example

Cereal is sold in boxes of 350 g

This week only, the boxes have been increased to fit an extra 12% free in there.

What is the weight of the special offer boxes?

Answer

An extra 12% means a 12% increase = 112% = 1.12

350 x 1.12 = 392 g

Let's try a mixture of questions now.

Remember that if the question is about money,  give your answer to 2 decimal places - that is pounds and pence - unless it is a whole number.

Let's get started.

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