The ratio of Ryan's to Eric's money is 4 : 5. The ratio of Eric's to Ben's money is 3 : 4. If Ryan has $132, how much less does Eric have than Ben?
| Ryan |
Eric |
Ben |
| 4x3 |
5x3 |
|
| |
3x5 |
4x5 |
| 12 u |
15 u |
20 u |
The amount that Eric has is the repeated identity.
Use LCM to make it the same.
LCM of 5 and 3 = 15
Amount that Ryan has = 12 u
12 u = 132
1 u = 132 ÷ 12 = 11
Amount that Eric has less than Ben
= 20 u - 15 u
= 5 u
= 5 x 11
= $55
Answer(s): $55
