Fanny went shopping with twice as much money as Jean. After Fanny spent $140, Jean had four times as much money as Fanny had left. How much less money did Jean bring along for shopping than Fanny?
| |
Fanny |
Jean |
Difference |
| Before |
2x4 =
8 u |
1x4 =
4 u |
4 u |
| Change |
- $140 |
|
|
| After |
1 u |
4 u |
|
The amount that Jean has remains unchanged at first and in the end. Make the amount that Jean has the same. LCM of 1 and 4 is 4.
Amount that Fanny spent
= 8 u - 1 u
= 7 u
7 u = 140
1 u = 140 ÷ 7 = 20
Amount that Jean brought along less than Fanny
= 8 u - 4 u
= 4 u
= 4 x 20
= $80
Answer(s): $80
