Question 284549
k+m+d=x
d/m=3x/4x
d/m=3/4
3m=4d
m=4d/3
k+m+d=x
3x/4+4d/3+d=x
9x+16d+12d=12x
28d=3x
28d/3=x
d=3x/28 dads
m+d=1x/4
m+3x/28=x/4
4m+3x/7=x
28m+3x=7x
28m=4x
m=4x/28=x/7

m/x=1/7 moms 
(1/7)*100 % answer