Week 15 Ratio Plenary

Write the following in their simplest form 6:9

• 1:9

• 2:3

• 6:9

• 12:18

Write the following in their simplest form 12:40

• 6:20

• 3:10

• 24:80

• 3:4

Write the following in their simplest form 2:4:8

• 4:8:16

• 3:5:9

• 1:2:4

• 8:16:32

Write the following in their simplest form 18:63:9

• 2:7:1

• 3:6:4

• 32:93:27

• 1:4:5

The ratio of girls to boys in a class is 4 : 5

What fraction of the class are girls

•  $\frac{1}{2}$  

•  $\frac{4}{9}$  

•  $\frac{3}{4}$  

•  $\frac{5}{9}$