The ratio of Xavier's to Warren's money is 7 : 4. The ratio of Warren's to Justin's money is 3 : 5. If Xavier has $357, how much less does Warren have than Justin?
| Xavier |
Warren |
Justin |
| 7x3 |
4x3 |
|
| |
3x4 |
5x4 |
| 21 u |
12 u |
20 u |
The amount that Warren has is the repeated identity.
Use LCM to make it the same.
LCM of 4 and 3 = 12
Amount that Xavier has = 21 u
21 u = 357
1 u = 357 ÷ 21 = 17
Amount that Warren has less than Justin
= 20 u - 12 u
= 8 u
= 8 x 17
= $136
Answer(s): $136
