The ratio of David's to Cody's money is 5 : 4. The ratio of Cody's to George's money is 3 : 4. If David has $225, how much more does George have than Cody?
| David |
Cody |
George |
| 5x3 |
4x3 |
|
| |
3x4 |
4x4 |
| 15 u |
12 u |
16 u |
The amount that Cody has is the repeated identity.
Use LCM to make it the same.
LCM of 4 and 3 = 12
Amount that David has = 15 u
15 u = 225
1 u = 225 ÷ 15 = 15
Amount that George has more than Cody
= 16 u - 12 u
= 4 u
= 4 x 15
= $60
Answer(s): $60
