The ratio of Dylan's to Elijah's money is 3 : 5. The ratio of Elijah's to Ivan's money is 3 : 5. If Dylan has $108, how much more does Ivan have than Elijah?
| Dylan |
Elijah |
Ivan |
| 3x3 |
5x3 |
|
| |
3x5 |
5x5 |
| 9 u |
15 u |
25 u |
The amount that Elijah has is the repeated identity.
Use LCM to make it the same.
LCM of 5 and 3 = 15
Amount that Dylan has = 9 u
9 u = 108
1 u = 108 ÷ 9 = 12
Amount that Ivan has more than Elijah
= 25 u - 15 u
= 10 u
= 10 x 12
= $120
Answer(s): $120
