Cathy went shopping with thrice as much money as Wendy. After Cathy spent $300, Wendy had twice as much money as Cathy had left. How much less money did Wendy bring along for shopping than Cathy?
| |
Cathy |
Wendy |
Difference |
| Before |
3x2 =
6 u |
1x2 =
2 u |
4 u |
| Change |
- $300 |
|
|
| After |
1 u |
2 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 2 is 2.
Amount that Cathy spent
= 6 u - 1 u
= 5 u
5 u = 300
1 u = 300 ÷ 5 = 60
Amount that Wendy brought along less than Cathy
= 6 u - 2 u
= 4 u
= 4 x 60
= $240
Answer(s): $240
