Billy and Eric had some money at first. Billy received 2 times as much money as Eric every day. At the end of 2 days, both of them had the same amount of money. If Eric had $1120 at first and Billy had $1600 at the end of those 2 days, what is the ratio of Billy's money to the total amount of money at first?
| |
Billy |
Eric |
| Before |
? |
$1120 |
| Change |
+ 2 u |
+ 1 u |
| After |
$1600 |
$1600 |
Amount that Eric received every day
= 1600 - 1120
= $480
1 u = 480
Amount that Billy received every day
= 2 u
= 2 x 480
= $960
Amount that Billy had at first
= 1600 - 960
= $640
Total amount that Billy and Eric had at first
= 1120 + 640
= $1760
Billy's amount : Total amount
640 : 1760
4 : 11
Answer(s): 4 : 11
