The ratio of Gabriel's to Oscar's money is 8 : 9. The ratio of Oscar's to Pierre's money is 3 : 5. If Gabriel has $80, how much less does Oscar have than Pierre?
| Gabriel |
Oscar |
Pierre |
| 8x1 |
9x1 |
|
| |
3x3 |
5x3 |
| 8 u |
9 u |
15 u |
The amount that Oscar has is the repeated identity.
Use LCM to make it the same.
LCM of 9 and 3 = 9
Amount that Gabriel has = 8 u
8 u = 80
1 u = 80 ÷ 8 = 10
Amount that Oscar has less than Pierre
= 15 u - 9 u
= 6 u
= 6 x 10
= $60
Answer(s): $60
