Billy and Peter had some money at first. Billy received 2 times as much money as Peter every day. At the end of 6 days, both of them had the same amount of money. If Peter had $1440 at first and Billy had $2070 at the end of those 6 days, what is the ratio of Billy's money to the total amount of money at first?
| |
Billy |
Peter |
| Before |
? |
$1440 |
| Change |
+ 2 u |
+ 1 u |
| After |
$2070 |
$2070 |
Amount that Peter received every day
= 2070 - 1440
= $630
1 u = 630
Amount that Billy received every day
= 2 u
= 2 x 630
= $1260
Amount that Billy had at first
= 2070 - 1260
= $810
Total amount that Billy and Peter had at first
= 1440 + 810
= $2250
Billy's amount : Total amount
810 : 2250
9 : 25
Answer(s): 9 : 25
