The ratio of Bobby's to Owen's money is 6 : 5. The ratio of Owen's to Ben's money is 3 : 5. If Bobby has $342, how much less does Owen have than Ben?
| Bobby |
Owen |
Ben |
| 6x3 |
5x3 |
|
| |
3x5 |
5x5 |
| 18 u |
15 u |
25 u |
The amount that Owen has is the repeated identity.
Use LCM to make it the same.
LCM of 5 and 3 = 15
Amount that Bobby has = 18 u
18 u = 342
1 u = 342 ÷ 18 = 19
Amount that Owen has less than Ben
= 25 u - 15 u
= 10 u
= 10 x 19
= $190
Answer(s): $190
