The ratio of Bryan's money to Charlie's money is 6 : 3.
The ratio of Charlie's money to Adam's money is 9 : 8.
The total amount that they have is $315.
How much less money does Adam have than Bryan?
Bryan |
Charlie |
Adam |
6 x 3 |
3 x 3 |
|
|
9 x 1 |
8 x 1 |
18 u |
9 u |
8 u |
Amount that Charlie has is the repeated identity.
Make the amount that Charlie has the same using the LCM of 3 and 9.
LCM of 3 and 9 = 9
Bryan : Charlie : Adam
18 : 9 : 8
Total amount that Bryan, Charlie and Adam have
= 18 u + 9 u + 8 u
= 35 u
35 u = 315
1 u = 315 ÷ 35 = 9
Amount that Adam has less than Bryan
= 18 u - 8 u
= 10 u
= 10 x 9
= $90
Answer(s): $90