The ratio of Caden's to Oliver's money is 3 : 4. The ratio of Oliver's to Charlie's money is 3 : 4. If Caden has $90, how much less does Oliver have than Charlie?
| Caden |
Oliver |
Charlie |
| 3x3 |
4x3 |
|
| |
3x4 |
4x4 |
| 9 u |
12 u |
16 u |
The amount that Oliver has is the repeated identity.
Use LCM to make it the same.
LCM of 4 and 3 = 12
Amount that Caden has = 9 u
9 u = 90
1 u = 90 ÷ 9 = 10
Amount that Oliver has less than Charlie
= 16 u - 12 u
= 4 u
= 4 x 10
= $40
Answer(s): $40
