# Understand Ratios

In this worksheet, students will recognise and use ratio notation

Key stage:  KS 3

Curriculum topic:   Ratio, Proportion and Rates of Change

Curriculum subtopic:   Relate Ratio Language to Fractions and Linear Functions

Difficulty level:

#### Worksheet Overview

In this activity, we will be looking at ratio.

Ratio is a relationship between  two amounts showing the number of times one value is contained within the other.

Imagine that we had a jar of sweets and 1/4 of the sweets were white and 3/4 of the sweets were pink.

The fractions give us a proportion of the full jar, but we can write them as a ratio.

This is a proportion in terms of each other.

Therefore, white is 1 part and pink is 3 parts.

We can write it as 1:3

White : Pink is 1:3            Pink : White is 3:1

Does that make sense?

Don't worry - we'll practise some questions together and you'll soon get the hang of them.

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