Witton Middle School

# Mrs Miele

This week, we are revising ratio and proportionThese words can be confusing. On a bottle of orange squash it might say "dilute one part concentrate to four parts water".

Ratio compares the two quantities. Here, that is squash (1 part) and water (4 parts)

squash : water

1 : 4

Proportion tells us how much one part is of the whole. Here, one fifth of the drink is squash. This is often written as a fraction.

You can summarise this as ratio is part to part and proportion is part to whole.

Introduction videos

ratio introduction

proportion introduction

Monday - proportion recipes

1. proportion introduction
2. scaling and rate problems

Do as many of these fluency questions as you can in the time on paper or in a blank word document.

Tuesday – ratio

1. ordering and simplifying fractions
2. ratio introduction
3. modelling ratio

If you need a reminder, you can watch this video on simplifying ratios.

Wednesday – ratios and comparing

Do p33 and 34 in your CGP book.

Thursday – sharing the total