The ratio of Peter's to Ryan's money is 4 : 3. The ratio of Ryan's to Sam's money is 4 : 5. If Peter has $208, how much more does Sam have than Ryan?
| Peter |
Ryan |
Sam |
| 4x4 |
3x4 |
|
| |
4x3 |
5x3 |
| 16 u |
12 u |
15 u |
The amount that Ryan has is the repeated identity.
Use LCM to make it the same.
LCM of 3 and 4 = 12
Amount that Peter has = 16 u
16 u = 208
1 u = 208 ÷ 16 = 13
Amount that Sam has more than Ryan
= 15 u - 12 u
= 3 u
= 3 x 13
= $39
Answer(s): $39
