There were 264 adults enrolled in the Kylie Swimming School in 2017. ⁴₁₁ of the adults were men. Additional adults joined the swimming school in 2018. For every 4 men who joined the swimming school, 3 women joined the swimming school. If there was an equal number of women and men in 2018, how many women joined the school in that year?

	Men	Women
Before	96	168
Change	+ 4 u	+ 3 u
After	96 + 4 u	168 + 3 u

Fraction of adults who are women
= 1 - ⁴₁₁
= ⁷₁₁

Number of men at first
= ⁴₁₁ x 264
= 96

Number of women at first
= ⁷₁₁ x 264
= 168

Men who joined : Women who joined
4 : 3

The number of women and men in the end is the same.

96 + 4 u = 168 + 3 u
4 u - 3 u = 168 - 96

1 u = 72

Number of women who joined the school in that year
= 3 u
= 3 x 72
= 216

Answer(s): 216