The ratio of Daniel's to Harry's money is 7 : 6. The ratio of Harry's to Seth's money is 4 : 5. If Daniel has $280, how much less does Harry have than Seth?
| Daniel |
Harry |
Seth |
| 7x2 |
6x2 |
|
| |
4x3 |
5x3 |
| 14 u |
12 u |
15 u |
The amount that Harry has is the repeated identity.
Use LCM to make it the same.
LCM of 6 and 4 = 12
Amount that Daniel has = 14 u
14 u = 280
1 u = 280 ÷ 14 = 20
Amount that Harry has less than Seth
= 15 u - 12 u
= 3 u
= 3 x 20
= $60
Answer(s): $60
