The ratio of Reggie's to Will's money is 4 : 7. The ratio of Will's to Luis's money is 3 : 4. If Reggie has $216, how much more does Luis have than Will?
Reggie |
Will |
Luis |
4x3 |
7x3 |
|
|
3x7 |
4x7 |
12 u |
21 u |
28 u |
The amount that Will has is the repeated identity.
Use LCM to make it the same.
LCM of 7 and 3 = 21
Amount that Reggie has = 12 u
12 u = 216
1 u = 216 ÷ 12 = 18
Amount that Luis has more than Will
= 28 u - 21 u
= 7 u
= 7 x 18
= $126
Answer(s): $126