Ratio and Proportion Topic Guide

Ratio and proportion are ways of expressing the relationship between two or more quantities. We use them all the time: the instructions for making up squash will often say that you use 1 part squash to 4 parts water. This is a ratio (1:4).

Maths problems that include ratio and proportion are usually set in a practical context, such as mixing paint or scaling up ingredients in a recipe.

Teach your children about the ratio and proportion using our handy topic guide!

Choose a section:
Teaching Ideas | Resources | Facts | Videos | Books | Links

Teaching Ideas



Ratio and Proportion Facts

  • A ratio is a way of comparing the size of two quantities in relation to each other. For example, if there are 2 blue marbles and 3 red marbles, the ration is 2:3.
  • Proportion tells us how much of one thing there is out of a whole number. For example, if there are 2 blue marbles and 3 red marbles, the proportion of red marble is 3 out of 5.
  • When you simplify a ratio, you need to divide all of the numbers in the ratio by the same number.


Introduction to ratio and proportion

This lesson recorded lesson is a good introduction to the topic and includes a vocabulary list.

Running time: 4:51

Proportion – Primary

There are great worked examples of ratio and proportion problems in this video.

Running time: 6:38

Proportion: Ice Cream example

This quick video shows how to solve a KS2 SATs question on proportion.

Running time: 0:54


Pythagoras and the Ratios

Find out how ratios are used in music while you enjoy this funny story.

Maths is Easy - Ratio, Proportion and Algebra

This revision guide is clearly set out with information and practice problems.

Speed, Proportion and Ratio

This workbook is perfect for practising ratio and proportion.

SAT Smasher: Ratio and Proportion

Practise using ratio and proportion with this book.

Are you teaching your children about other topics? Explore our full collection of guides!

Free Preview Packs

Download our FREE Preview Packs!

Join our newsletter and we will send you free samples of our popular Teaching Packs by email!