The ratio of Ben's to Vincent's money is 5 : 6. The ratio of Vincent's to Mark's money is 3 : 5. If Ben has $75, how much less does Vincent have than Mark?
| Ben |
Vincent |
Mark |
| 5x1 |
6x1 |
|
| |
3x2 |
5x2 |
| 5 u |
6 u |
10 u |
The amount that Vincent has is the repeated identity.
Use LCM to make it the same.
LCM of 6 and 3 = 6
Amount that Ben has = 5 u
5 u = 75
1 u = 75 ÷ 5 = 15
Amount that Vincent has less than Mark
= 10 u - 6 u
= 4 u
= 4 x 15
= $60
Answer(s): $60
