The ratio of Caden's to Bobby's money is 7 : 5. The ratio of Bobby's to Lee's money is 3 : 4. If Caden has $273, how much less does Bobby have than Lee?
| Caden |
Bobby |
Lee |
| 7x3 |
5x3 |
|
| |
3x5 |
4x5 |
| 21 u |
15 u |
20 u |
The amount that Bobby has is the repeated identity.
Use LCM to make it the same.
LCM of 5 and 3 = 15
Amount that Caden has = 21 u
21 u = 273
1 u = 273 ÷ 21 = 13
Amount that Bobby has less than Lee
= 20 u - 15 u
= 5 u
= 5 x 13
= $65
Answer(s): $65
