The ratio of Elijah's to Andy's money is 4 : 5. The ratio of Andy's to Ivan's money is 4 : 5. If Elijah has $176, how much less does Andy have than Ivan?
| Elijah |
Andy |
Ivan |
| 4x4 |
5x4 |
|
| |
4x5 |
5x5 |
| 16 u |
20 u |
25 u |
The amount that Andy has is the repeated identity.
Use LCM to make it the same.
LCM of 5 and 4 = 20
Amount that Elijah has = 16 u
16 u = 176
1 u = 176 ÷ 16 = 11
Amount that Andy has less than Ivan
= 25 u - 20 u
= 5 u
= 5 x 11
= $55
Answer(s): $55
