The ratio of Bryan's to Dylan's money is 6 : 7. The ratio of Dylan's to Perry's money is 3 : 5. If Bryan has $270, how much more does Perry have than Dylan?
Bryan |
Dylan |
Perry |
6x3 |
7x3 |
|
|
3x7 |
5x7 |
18 u |
21 u |
35 u |
The amount that Dylan has is the repeated identity.
Use LCM to make it the same.
LCM of 7 and 3 = 21
Amount that Bryan has = 18 u
18 u = 270
1 u = 270 ÷ 18 = 15
Amount that Perry has more than Dylan
= 35 u - 21 u
= 14 u
= 14 x 15
= $210
Answer(s): $210