The ratio of Albert's to Owen's money is 7 : 9. The ratio of Owen's to Gabriel's money is 4 : 5. If Albert has $280, how much less does Owen have than Gabriel?
| Albert |
Owen |
Gabriel |
| 7x4 |
9x4 |
|
| |
4x9 |
5x9 |
| 28 u |
36 u |
45 u |
The amount that Owen has is the repeated identity.
Use LCM to make it the same.
LCM of 9 and 4 = 36
Amount that Albert has = 28 u
28 u = 280
1 u = 280 ÷ 28 = 10
Amount that Owen has less than Gabriel
= 45 u - 36 u
= 9 u
= 9 x 10
= $90
Answer(s): $90
