Erika had $120 less than Betty. Betty spent 0.6 of her money and Erika spent 20% of her money. In the end, Betty and Erika had the same amount of money left. Find the amount of money that Betty had at first.
| |
Erika |
Betty |
Comparing Betty
and Erika at first |
|
120 more |
| Before |
5x1 =
5 u |
5x2 =
10 u |
| Change |
- 1x1 =
- 1 u |
- 3x2 =
- 6 u |
| After |
4x1 =
4 u |
2x2 =
4 u |
0.6 =
610 =
35 20% =
20100 =
15 Erika and Betty had the same amount of money in the end. Make the amount that each had in the end the same. LCM of 2 and 4 is 4.
Amount that Erika had less than Betty at first
= 10 u - 5 u
= 5 u
5 u = 120
1 u = 120 ÷ 5 = 24
Amount that Betty had at first
= 10 u
= 10 x 24
= $240
Answer(s): $240
