The ratio of Cody's to Charlie's money is 7 : 10. The ratio of Charlie's to Luke's money is 4 : 5. If Cody has $196, how much less does Charlie have than Luke?
| Cody |
Charlie |
Luke |
| 7x2 |
10x2 |
|
| |
4x5 |
5x5 |
| 14 u |
20 u |
25 u |
The amount that Charlie has is the repeated identity.
Use LCM to make it the same.
LCM of 10 and 4 = 20
Amount that Cody has = 14 u
14 u = 196
1 u = 196 ÷ 14 = 14
Amount that Charlie has less than Luke
= 25 u - 20 u
= 5 u
= 5 x 14
= $70
Answer(s): $70
