The ratio of Lee's to Oscar's money is 8 : 9. The ratio of Oscar's to Sam's money is 4 : 5. If Lee has $416, how much more does Sam have than Oscar?
Lee |
Oscar |
Sam |
8x4 |
9x4 |
|
|
4x9 |
5x9 |
32 u |
36 u |
45 u |
The amount that Oscar has is the repeated identity.
Use LCM to make it the same.
LCM of 9 and 4 = 36
Amount that Lee has = 32 u
32 u = 416
1 u = 416 ÷ 32 = 13
Amount that Sam has more than Oscar
= 45 u - 36 u
= 9 u
= 9 x 13
= $117
Answer(s): $117