The ratio of Carl's to Oscar's money is 7 : 10. The ratio of Oscar's to Archie's money is 4 : 5. If Carl has $266, how much more does Archie have than Oscar?
| Carl |
Oscar |
Archie |
| 7x2 |
10x2 |
|
| |
4x5 |
5x5 |
| 14 u |
20 u |
25 u |
The amount that Oscar has is the repeated identity.
Use LCM to make it the same.
LCM of 10 and 4 = 20
Amount that Carl has = 14 u
14 u = 266
1 u = 266 ÷ 14 = 19
Amount that Archie has more than Oscar
= 25 u - 20 u
= 5 u
= 5 x 19
= $95
Answer(s): $95
