The ratio of Adam's money to Bryan's money is 7 : 6.
The ratio of Bryan's money to Charlie's money is 4 : 3.
The total amount that they have is $420.
How much less money does Charlie have than Adam?
Adam |
Bryan |
Charlie |
7 x 2 |
6 x 2 |
|
|
4 x 3 |
3 x 3 |
14 u |
12 u |
9 u |
Amount that Bryan has is the repeated identity.
Make the amount that Bryan has the same using the LCM of 6 and 4.
LCM of 6 and 4 = 12
Adam : Bryan : Charlie
14 : 12 : 9
Total amount that Adam, Bryan and Charlie have
= 14 u + 12 u + 9 u
= 35 u
35 u = 420
1 u = 420 ÷ 35 = 12
Amount that Charlie has less than Adam
= 14 u - 9 u
= 5 u
= 5 x 12
= $60
Answer(s): $60