There were 154 children enrolled in the Kylie Swimming School in 2021. ³₇ of the children were boys. Additional children joined the swimming school in 2022. For every 3 boys who joined the swimming school, 2 girls joined the swimming school. If there was an equal number of girls and boys in 2022, how many girls joined the school in that year?

	Boys	Girls
Before	66	88
Change	+ 3 u	+ 2 u
After	66 + 3 u	88 + 2 u

Fraction of children who are girls
= 1 - ³₇
= ⁴₇

Number of boys at first
= ³₇ x 154
= 66

Number of girls at first
= ⁴₇ x 154
= 88

Boys who joined : Girls who joined
3 : 2

The number of girls and boys in the end is the same.

66 + 3 u = 88 + 2 u
3 u - 2 u = 88 - 66

1 u = 22

Number of girls who joined the school in that year
= 2 u
= 2 x 22
= 44

Answer(s): 44