Question

The ratio of girls to boys in a sports club is 3: 5

There are 27 girls in the club. How many boys are there?

Answer 1

Their are 45 boys.

Explanation:

Let's represent Girls by G,and Boys by B

so G = 27 and B = ? and G/B = 3:5 or 3/5

3 = 27

5. B

3B = 135

3. 3

B = 45

Answer 2

45 boys

Explanation:

The 3 part of the ratio refers to the number of girls.

Divide number of girls by 3 to find the value of one part of the ratio

27 ÷ 3 = 9 ← value of 1 part of the ratio, then

5 parts = 5 × 9 = 45 ← number of boys