The ratio of David's to Tim's money is 4 : 3. The ratio of Tim's to Cody's money is 3 : 5. If David has $60, how much less does Tim have than Cody?
| David |
Tim |
Cody |
| 4x1 |
3x1 |
|
| |
3x1 |
5x1 |
| 4 u |
3 u |
5 u |
The amount that Tim has is the repeated identity.
Use LCM to make it the same.
LCM of 3 and 3 = 3
Amount that David has = 4 u
4 u = 60
1 u = 60 ÷ 4 = 15
Amount that Tim has less than Cody
= 5 u - 3 u
= 2 u
= 2 x 15
= $30
Answer(s): $30
