The ratio of Dylan's to Liam's money is 7 : 8. The ratio of Liam's to Ben's money is 4 : 5. If Dylan has $119, how much more does Ben have than Liam?
| Dylan |
Liam |
Ben |
| 7x1 |
8x1 |
|
| |
4x2 |
5x2 |
| 7 u |
8 u |
10 u |
The amount that Liam has is the repeated identity.
Use LCM to make it the same.
LCM of 8 and 4 = 8
Amount that Dylan has = 7 u
7 u = 119
1 u = 119 ÷ 7 = 17
Amount that Ben has more than Liam
= 10 u - 8 u
= 2 u
= 2 x 17
= $34
Answer(s): $34
