The ratio of boys to girls riding on a school bus is 4: 3. if there are 56 total students on the bus, how many girls are on the bus?

Boys : girls 
   4 .  :   3

Total Share = 4 + 3 = 7
Total students = 56


Find 1 share of the ratio

7 shares = 56
1 share = 56 ÷ 7
1 share = 8


The girls made up 3 shares in the ratio. Find 3 shares:

1 share = 8 
3 shares = 8 x 3
3 shares = 24 


There are 24 girls on the bus.

1) 4+3= 7 parts,
56/7= 8 is one part, because girls are 3 parts then 3*8=24
or
2) boys =4x, girls =3x
4x+3x=56,    7x=56, x=8
girls =3x=3*8=24
girls =24

D.