Ratio and proportion

• New lesson editor
• Mathematics
• Upper Secondary (Key Stage 4)
• GCSE

FS Maths

Ratio & proportion

red paint to white paint is 1  : 4

0.2 red paint and 0.8 white paint

one part red to four parts white

Red paint is 20% of the mixture. White paint is 80% of the mixture.

Red paint is 1/5 of the mixture. White paint is 4/5 of the mixture.

Four times as much white paint as red paint.

2

m

30

s

+30 s

2 : 1

20 : 1

1 : 50

100 : 50

£10 : 50p

10p : £5

Activity - Forms

Express a number as a ratio:

https://forms.office.com/Pages/ResponsePage.aspx?id=sdfxjyedoky9KUtbMWqP2YK9-j0-3WZEiCtjohCQFzhUNEUxSFJJRVkzVVlUWFFBVTY0NkQwMFFaUy4u

The ratio of iphones to android phones sold in the UK is 3:1. If there are 16 million phones sold each year, How many iphones are sold?

A

10 million

B

12 million

C

8 million

D

4 million

A paint mixture uses 3 parts blue paint to 8 parts red paint. How much red paint would I need for 600ml of blue paint?

A

1000ml

B

800ml

C

2400ml

D

1600ml

What have you learn't today that you did not already know?

Self-study - Forms

ESQ - Ratio & proportion - C:

https://forms.office.com/Pages/ResponsePage.aspx?id=sdfxjyedoky9KUtbMWqP2YK9-j0-3WZEiCtjohCQFzhURjBOQjAyRUNDUzI5VVA2WjBGUUE1R1QxTS4u

Video links

Simplifying Ratio Video – Corbettmaths

Ratio – Sharing the total Video – Corbettmaths

Ratio – given one quantity Video – Corbettmaths

Direct Proportion Video – Corbettmaths

Unitary Method Video – Corbettmaths

Recipes Video – Corbettmaths