The ratio of Vaidev's to John's money is 3 : 5. The ratio of John's to Caden's money is 4 : 5. If Vaidev has $120, how much less does John have than Caden?
| Vaidev |
John |
Caden |
| 3x4 |
5x4 |
|
| |
4x5 |
5x5 |
| 12 u |
20 u |
25 u |
The amount that John has is the repeated identity.
Use LCM to make it the same.
LCM of 5 and 4 = 20
Amount that Vaidev has = 12 u
12 u = 120
1 u = 120 ÷ 12 = 10
Amount that John has less than Caden
= 25 u - 20 u
= 5 u
= 5 x 10
= $50
Answer(s): $50
