The ratio of Peter's to Ken's money is 6 : 5. The ratio of Ken's to Eric's money is 3 : 4. If Peter has $198, how much more does Eric have than Ken?
Peter |
Ken |
Eric |
6x3 |
5x3 |
|
|
3x5 |
4x5 |
18 u |
15 u |
20 u |
The amount that Ken has is the repeated identity.
Use LCM to make it the same.
LCM of 5 and 3 = 15
Amount that Peter has = 18 u
18 u = 198
1 u = 198 ÷ 18 = 11
Amount that Eric has more than Ken
= 20 u - 15 u
= 5 u
= 5 x 11
= $55
Answer(s): $55