Roshel went shopping with thrice as much money as Wendy. After Roshel spent $660, Wendy had four times as much money as Roshel had left. How much less money did Wendy bring along for shopping than Roshel?
| |
Roshel |
Wendy |
Difference |
| Before |
3x4 =
12 u |
1x4 =
4 u |
8 u |
| Change |
- $660 |
|
|
| After |
1 u |
4 u |
|
The amount that Wendy has remains unchanged at first and in the end. Make the amount that Wendy has the same. LCM of 1 and 4 is 4.
Amount that Roshel spent
= 12 u - 1 u
= 11 u
11 u = 660
1 u = 660 ÷ 11 = 60
Amount that Wendy brought along less than Roshel
= 12 u - 4 u
= 8 u
= 8 x 60
= $480
Answer(s): $480
