In a survey of parents, exactly 7/8 of the mothers and 3/4 of the fathers held full-time jobs. If 60 percent of the parents surveyed were women, what percent of the parents did not hold full-time jobs? Choose the correct option:
A) 25.5%
B) 21.5%
C) 17.5%
D) 13.5%
E) 9.5%
Fathers without full-time jobs are 1/4*2/5 = 2/20 of all the parents surveyed.   Mothers without full-time jobs are 1/8*3/5 = 3/40 of all the parents surveyed.   The percent of parents without full-time jobs is 2/20 + 3/40 = 7/40 = 17.5%   The answer is 17.5%.
<result>C</result>
In a survey of parents, exactly 7/8 of the mothers and 3/4 of the fathers held full-time jobs. If 60 percent of the parents surveyed were women, what percent of the parents did not hold full-time jobs?