The ratio of Sam's to Brandon's money is 3 : 7. The ratio of Brandon's to Caden's money is 4 : 5. If Sam has $156, how much less does Brandon have than Caden?
Sam |
Brandon |
Caden |
3x4 |
7x4 |
|
|
4x7 |
5x7 |
12 u |
28 u |
35 u |
The amount that Brandon has is the repeated identity.
Use LCM to make it the same.
LCM of 7 and 4 = 28
Amount that Sam has = 12 u
12 u = 156
1 u = 156 ÷ 12 = 13
Amount that Brandon has less than Caden
= 35 u - 28 u
= 7 u
= 7 x 13
= $91
Answer(s): $91