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

A) What fraction of the class are boys

4/9

Step-by-step explanation:

Ratio of boys = 4

Ratio of girls = 5

1. When illustrating ratios in fraction, you add the ratios

4 + 5 = 9

2. Next you put the boys ratio over the total ratio

4/9

3. Sometimes it can be reduced to a lower form eg. 5/10 can be reduced to

1/2.