The ratio of Zane's to Lee's money is 4 : 5. The ratio of Lee's to Sam's money is 4 : 5. If Zane has $320, how much less does Lee have than Sam?
| Zane |
Lee |
Sam |
| 4x4 |
5x4 |
|
| |
4x5 |
5x5 |
| 16 u |
20 u |
25 u |
The amount that Lee has is the repeated identity.
Use LCM to make it the same.
LCM of 5 and 4 = 20
Amount that Zane has = 16 u
16 u = 320
1 u = 320 ÷ 16 = 20
Amount that Lee has less than Sam
= 25 u - 20 u
= 5 u
= 5 x 20
= $100
Answer(s): $100
