The ratio of Pierre's to Eric's money is 5 : 4. The ratio of Eric's to Lee's money is 3 : 4. If Pierre has $180, how much less does Eric have than Lee?
| Pierre |
Eric |
Lee |
| 5x3 |
4x3 |
|
| |
3x4 |
4x4 |
| 15 u |
12 u |
16 u |
The amount that Eric has is the repeated identity.
Use LCM to make it the same.
LCM of 4 and 3 = 12
Amount that Pierre has = 15 u
15 u = 180
1 u = 180 ÷ 15 = 12
Amount that Eric has less than Lee
= 16 u - 12 u
= 4 u
= 4 x 12
= $48
Answer(s): $48
