一道数学题，请大家帮忙指点一下，谢谢！

Q17:

In Town X, 64 percent of the population are employed, and 48 percent of the population are employed males.  What percent of the employed people in Town X are females?

A.     16%

B.     25%

C.     32%

D.     40%

E.      52%

Answer: B

设全镇m中employed的人中有x%是male.

m*64%*X%=m*48%

可以求得x=75%

则 female 占25%