Last week, Diana had four times as much savings as Billy. This week, Billy saves $490. As a result, he now has twice as much savings as Diana. What is their total savings now?
| |
Diana |
Billy |
Total |
| Before |
4 u |
1 u |
|
| Change |
|
+ $490 |
|
| After |
1x4 =
4 u |
2x4 =
8 u |
12 u |
The amount of savings that Diana has at first and in the end remains unchanged. Make the amount of savings that Diana has the same. LCM of 4 and 1 is 4.
Amount that Billy saved
= 8 u - 1 u
= 7 u
7 u = 490
1 u = 490 ÷ 7 = 70
Total savings now
= 4 u + 8 u
= 12 u
= 12 x 70
= $840
Answer(s): $840
