The ratio of Adam's money to Bryan's money is 7 : 6.
The ratio of Bryan's money to Charlie's money is 9 : 8.
The total amount that they have is $330.
How much more money does Adam have than Charlie?
Adam |
Bryan |
Charlie |
7 x 3 |
6 x 3 |
|
|
9 x 2 |
8 x 2 |
21 u |
18 u |
16 u |
Amount that Bryan has is the repeated identity.
Make the amount that Bryan has the same using the LCM of 6 and 9.
LCM of 6 and 9 = 18
Adam : Bryan : Charlie
21 : 18 : 16
Total amount that Adam, Bryan and Charlie have
= 21 u + 18 u + 16 u
= 55 u
55 u = 330
1 u = 330 ÷ 55 = 6
Amount that Adam has more than Charlie
= 21 u - 16 u
= 5 u
= 5 x 6
= $30
Answer(s): $30