The ratio of George's to Oscar's money is 5 : 4. The ratio of Oscar's to Michael's money is 3 : 5. If George has $180, how much more does Michael have than Oscar?
| George |
Oscar |
Michael |
| 5x3 |
4x3 |
|
| |
3x4 |
5x4 |
| 15 u |
12 u |
20 u |
The amount that Oscar has is the repeated identity.
Use LCM to make it the same.
LCM of 4 and 3 = 12
Amount that George has = 15 u
15 u = 180
1 u = 180 ÷ 15 = 12
Amount that Michael has more than Oscar
= 20 u - 12 u
= 8 u
= 8 x 12
= $96
Answer(s): $96
