Nathan B. answered • 10/24/14

Elementary and Algebraic skilled

You are on the right track; you just need to think of the percentages as fractions instead. For every girl, there are three boys. This means that there are sets of 4 students (1 of the 4 is a girl, 3 of the 4 are boys, or

^{1}/_{4}and^{3}/_{4}). 3 x

--- * -----

4 236

Cross multiplying time!

3 * 236 = 4x

708 = 4x

177 = x

There are 177 boys in the martial arts school.