Mary had $105 more than Min. Mary spent 0.4 of her money and Min spent 20% of her money. In the end, Mary and Min had the same amount of money left. Find the amount of money that Mary had in the end.
| |
Mary |
Min |
Comparing Mary
and Min at first |
105 more |
|
| Before |
5x4 =
20 u |
5x3 =
15 u |
| Change |
- 2x4 =
- 8 u |
- 1x3 =
- 3 u |
| After |
3x4 =
12 u |
4x3 =
12 u |
0.4 =
410 =
25 20% =
20100 =
15 Mary and Min had the same amount of money in the end. Make the amount that each had in the end the same. LCM of 3 and 4 is 12.
Amount that Mary had more than Min at first
= 20 u - 15 u
= 5 u
5 u = 105
1 u = 105 ÷ 5 = 21
Amount that Mary had in the end
= 12 u
= 12 x 21
= $252
Answer(s): $252
