Lucy had $500 more than Roshel. Lucy spent 0.8 of her money and Roshel spent 30% of her money. In the end, Lucy and Roshel had the same amount of money left. Find the amount of money that Lucy had in the end.
| |
Lucy |
Roshel |
Comparing Lucy
and Roshel at first |
500 more |
|
| Before |
5x7 =
35 u |
10x1 =
10 u |
| Change |
- 4x7 =
- 28 u |
- 3x1 =
- 3 u |
| After |
1x7 =
7 u |
7x1 =
7 u |
0.8 =
810 =
45 30% =
30100 =
310 Lucy and Roshel had the same amount of money in the end. Make the amount that each had in the end the same. LCM of 1 and 7 is 7.
Amount that Lucy had more than Roshel at first
= 35 u - 10 u
= 25 u
25 u = 500
1 u = 500 ÷ 25 = 20
Amount that Lucy had in the end
= 7 u
= 7 x 20
= $140
Answer(s): $140
