The ratio of Pierre's to Perry's money is 7 : 9. The ratio of Perry's to Flynn's money is 3 : 4. If Pierre has $112, how much more does Flynn have than Perry?
| Pierre |
Perry |
Flynn |
| 7x1 |
9x1 |
|
| |
3x3 |
4x3 |
| 7 u |
9 u |
12 u |
The amount that Perry has is the repeated identity.
Use LCM to make it the same.
LCM of 9 and 3 = 9
Amount that Pierre has = 7 u
7 u = 112
1 u = 112 ÷ 7 = 16
Amount that Flynn has more than Perry
= 12 u - 9 u
= 3 u
= 3 x 16
= $48
Answer(s): $48
