The ratio of Charlie's to Seth's money is 5 : 4. The ratio of Seth's to Ken's money is 3 : 5. If Charlie has $285, how much less does Seth have than Ken?
| Charlie |
Seth |
Ken |
| 5x3 |
4x3 |
|
| |
3x4 |
5x4 |
| 15 u |
12 u |
20 u |
The amount that Seth has is the repeated identity.
Use LCM to make it the same.
LCM of 4 and 3 = 12
Amount that Charlie has = 15 u
15 u = 285
1 u = 285 ÷ 15 = 19
Amount that Seth has less than Ken
= 20 u - 12 u
= 8 u
= 8 x 19
= $152
Answer(s): $152
