Question 9
There are the same number of boys and girls in a class. It is known that $60\%$ of pupils do sports and $\frac{5}{9}$ of pupils doing sports are boys. It is also known that $\frac{1}{3}$ of pupils doing sports go to math club and $\frac{2}{15}$ of girls neither do sports nor go to math club. On the other hand, $\frac{2}{15}$ of boys both do sports and go to math club. What percentage of girls go to math club?