The ratio of Ivan's to Julian's money is 5 : 7. The ratio of Julian's to Michael's money is 4 : 5. If Ivan has $280, how much more does Michael have than Julian?
Ivan |
Julian |
Michael |
5x4 |
7x4 |
|
|
4x7 |
5x7 |
20 u |
28 u |
35 u |
The amount that Julian has is the repeated identity.
Use LCM to make it the same.
LCM of 7 and 4 = 28
Amount that Ivan has = 20 u
20 u = 280
1 u = 280 ÷ 20 = 14
Amount that Michael has more than Julian
= 35 u - 28 u
= 7 u
= 7 x 14
= $98
Answer(s): $98