The ratio of Eric's to Carl's money is 7 : 6. The ratio of Carl's to Bobby's money is 4 : 5. If Eric has $154, how much less does Carl have than Bobby?
| Eric |
Carl |
Bobby |
| 7x2 |
6x2 |
|
| |
4x3 |
5x3 |
| 14 u |
12 u |
15 u |
The amount that Carl has is the repeated identity.
Use LCM to make it the same.
LCM of 6 and 4 = 12
Amount that Eric has = 14 u
14 u = 154
1 u = 154 ÷ 14 = 11
Amount that Carl has less than Bobby
= 15 u - 12 u
= 3 u
= 3 x 11
= $33
Answer(s): $33
