There are 10 men to 12 women and 10 women to 15 children. What is the ratio of men to children then!?

Answer 1

m/w = 10/12
so w = 12 m/10

then
w/c = 10/15
12 m /10 / c = 10/15

12 m/c = 100/15 = 20/3
m/c = 20/36 = 5/9