The ratio of Sean's to Nick's money is 4 : 9. The ratio of Nick's to Andy's money is 3 : 4. If Sean has $52, how much less does Nick have than Andy?
Sean |
Nick |
Andy |
4x1 |
9x1 |
|
|
3x3 |
4x3 |
4 u |
9 u |
12 u |
The amount that Nick has is the repeated identity.
Use LCM to make it the same.
LCM of 9 and 3 = 9
Amount that Sean has = 4 u
4 u = 52
1 u = 52 ÷ 4 = 13
Amount that Nick has less than Andy
= 12 u - 9 u
= 3 u
= 3 x 13
= $39
Answer(s): $39