The ratio of Vincent's to Oscar's money is 6 : 5. The ratio of Oscar's to Simon's money is 4 : 5. If Vincent has $432, how much less does Oscar have than Simon?
| Vincent |
Oscar |
Simon |
| 6x4 |
5x4 |
|
| |
4x5 |
5x5 |
| 24 u |
20 u |
25 u |
The amount that Oscar has is the repeated identity.
Use LCM to make it the same.
LCM of 5 and 4 = 20
Amount that Vincent has = 24 u
24 u = 432
1 u = 432 ÷ 24 = 18
Amount that Oscar has less than Simon
= 25 u - 20 u
= 5 u
= 5 x 18
= $90
Answer(s): $90
