Subject: mathqa
Question: in a survey of parents , exactly 7 / 8 of the mothers and 3 / 4 of the fathers held full - time jobs . if 40 percent of the parents surveyed were women , what percent of the parents did not hold full - time jobs ?
Option: 
A: 20 %
B: 15 %
C: 16 %
D: 18 %
Answer: A