The ratio of Gabriel's to Ahmad's money is 4 : 3. The ratio of Ahmad's to Andy's money is 3 : 5. If Gabriel has $40, how much less does Ahmad have than Andy?
| Gabriel |
Ahmad |
Andy |
| 4x1 |
3x1 |
|
| |
3x1 |
5x1 |
| 4 u |
3 u |
5 u |
The amount that Ahmad has is the repeated identity.
Use LCM to make it the same.
LCM of 3 and 3 = 3
Amount that Gabriel has = 4 u
4 u = 40
1 u = 40 ÷ 4 = 10
Amount that Ahmad has less than Andy
= 5 u - 3 u
= 2 u
= 2 x 10
= $20
Answer(s): $20
