The ratio of Jeremy's to Zeph's money is 5 : 9. The ratio of Zeph's to Perry's money is 4 : 5. If Jeremy has $340, how much less does Zeph have than Perry?
| Jeremy |
Zeph |
Perry |
| 5x4 |
9x4 |
|
| |
4x9 |
5x9 |
| 20 u |
36 u |
45 u |
The amount that Zeph has is the repeated identity.
Use LCM to make it the same.
LCM of 9 and 4 = 36
Amount that Jeremy has = 20 u
20 u = 340
1 u = 340 ÷ 20 = 17
Amount that Zeph has less than Perry
= 45 u - 36 u
= 9 u
= 9 x 17
= $153
Answer(s): $153
