Percentages question that I am stuck on

Question

One day at a school 70% of the students wore a polo shirt.

80% of the students wearing polo shirts were boys.

What percentage of the students were boys who wore polo shirts?

Answer 1

Start with 100 students. 70% of students wore a polo shirt = 70 students. 80% of students wearing polo shirts were boys = .8x70 = 56 boys wearing polo shirts. Therefore 56% of the students were boys wearing polo shirts.