The ratio of Xavier's to Bobby's money is 3 : 7. The ratio of Bobby's to Wesley's money is 3 : 5. If Xavier has $162, how much less does Bobby have than Wesley?
| Xavier |
Bobby |
Wesley |
| 3x3 |
7x3 |
|
| |
3x7 |
5x7 |
| 9 u |
21 u |
35 u |
The amount that Bobby has is the repeated identity.
Use LCM to make it the same.
LCM of 7 and 3 = 21
Amount that Xavier has = 9 u
9 u = 162
1 u = 162 ÷ 9 = 18
Amount that Bobby has less than Wesley
= 35 u - 21 u
= 14 u
= 14 x 18
= $252
Answer(s): $252
