The ratio of Bryan's to Peter's money is 3 : 7. The ratio of Peter's to Howard's money is 3 : 5. If Bryan has $144, how much less does Peter have than Howard?
| Bryan |
Peter |
Howard |
| 3x3 |
7x3 |
|
| |
3x7 |
5x7 |
| 9 u |
21 u |
35 u |
The amount that Peter has is the repeated identity.
Use LCM to make it the same.
LCM of 7 and 3 = 21
Amount that Bryan has = 9 u
9 u = 144
1 u = 144 ÷ 9 = 16
Amount that Peter has less than Howard
= 35 u - 21 u
= 14 u
= 14 x 16
= $224
Answer(s): $224
