Nora went shopping with thrice as much money as Jen. After Nora spent $990, Jen had four times as much money as Nora had left. How much less money did Jen bring along for shopping than Nora?
| |
Nora |
Jen |
Difference |
| Before |
3x4 =
12 u |
1x4 =
4 u |
8 u |
| Change |
- $990 |
|
|
| After |
1 u |
4 u |
|
The amount that Jen has remains unchanged at first and in the end. Make the amount that Jen has the same. LCM of 1 and 4 is 4.
Amount that Nora spent
= 12 u - 1 u
= 11 u
11 u = 990
1 u = 990 ÷ 11 = 90
Amount that Jen brought along less than Nora
= 12 u - 4 u
= 8 u
= 8 x 90
= $720
Answer(s): $720
