# Ratio and proportion Recommended

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Ratio and Proportion are linked closely with multiplication, division and fractions. Scaling problems, such as making a number ten times larger, or finding half the size of an amount, are the solid foundation on which ratio and proportion are built. This article provides a range of creative activities that can be used across Key Stage One and Key Stage Two, sparking discussions and developing children’s reasoning around these ideas.

### In the curriculum Although the 2014 curriculum does not use the terms ‘ratio’ and ‘proportion’ until Year 6, the basis of these concepts can be found across both Key Stages.

In a nutshell, ratio describes how one amount relates to another, for example:

“¾ of the class are boys and ¼ of the class are girls”

“for every 100g of flour I need to use 1 egg”.

So, although we are not using the term ‘ratio’ or its mathematical notation (a:b) with most Key Stage 1 and 2 children, we can still introduce this concept throughout maths lessons. In Year 2, children are asked to compare measures using simple multiples, such as ‘half as high’ and ‘twice as wide’.

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