The ratio of Zeph's to Ken's money is 6 : 7. The ratio of Ken's to Eric's money is 3 : 5. If Zeph has $324, how much more does Eric have than Ken?
Zeph |
Ken |
Eric |
6x3 |
7x3 |
|
|
3x7 |
5x7 |
18 u |
21 u |
35 u |
The amount that Ken has is the repeated identity.
Use LCM to make it the same.
LCM of 7 and 3 = 21
Amount that Zeph has = 18 u
18 u = 324
1 u = 324 ÷ 18 = 18
Amount that Eric has more than Ken
= 35 u - 21 u
= 14 u
= 14 x 18
= $252
Answer(s): $252