The ratio of Ryan's to Carl's money is 3 : 7. The ratio of Carl's to Jeremy's money is 3 : 5. If Ryan has $180, how much more does Jeremy have than Carl?
Ryan |
Carl |
Jeremy |
3x3 |
7x3 |
|
|
3x7 |
5x7 |
9 u |
21 u |
35 u |
The amount that Carl has is the repeated identity.
Use LCM to make it the same.
LCM of 7 and 3 = 21
Amount that Ryan has = 9 u
9 u = 180
1 u = 180 ÷ 9 = 20
Amount that Jeremy has more than Carl
= 35 u - 21 u
= 14 u
= 14 x 20
= $280
Answer(s): $280