The ratio of Charlie's money to Bryan's money is 6 : 4.
The ratio of Bryan's money to Adam's money is 7 : 3.
The total amount that they have is $328.
How much less money does Adam have than Charlie?
Charlie |
Bryan |
Adam |
6 x 7 |
4 x 7 |
|
|
7 x 4 |
3 x 4 |
42 u |
28 u |
12 u |
Amount that Bryan has is the repeated identity.
Make the amount that Bryan has the same using the LCM of 4 and 7.
LCM of 4 and 7 = 28
Charlie : Bryan : Adam
42 : 28 : 12
Total amount that Charlie, Bryan and Adam have
= 42 u + 28 u + 12 u
= 82 u
82 u = 328
1 u = 328 ÷ 82 = 4
Amount that Adam has less than Charlie
= 42 u - 12 u
= 30 u
= 30 x 4
= $120
Answer(s): $120