The ratio of Bryan's money to Adam's money is 7 : 6.
The ratio of Adam's money to Charlie's money is 9 : 3.
The total amount that they have is $315.
How much less money does Charlie have than Bryan?
Bryan |
Adam |
Charlie |
7 x 3 |
6 x 3 |
|
|
9 x 2 |
3 x 2 |
21 u |
18 u |
6 u |
Amount that Adam has is the repeated identity.
Make the amount that Adam has the same using the LCM of 6 and 9.
LCM of 6 and 9 = 18
Bryan : Adam : Charlie
21 : 18 : 6
Total amount that Bryan, Adam and Charlie have
= 21 u + 18 u + 6 u
= 45 u
45 u = 315
1 u = 315 ÷ 45 = 7
Amount that Charlie has less than Bryan
= 21 u - 6 u
= 15 u
= 15 x 7
= $105
Answer(s): $105