Tina had $130 more than Betty. Tina spent 0.8 of her money and Betty spent 40% of her money. In the end, Tina and Betty had the same amount of money left. Find the amount of money that Tina had in the end.
| |
Tina |
Betty |
Comparing Tina
and Betty at first |
130 more |
|
| Before |
5x3 =
15 u |
5x1 =
5 u |
| Change |
- 4x3 =
- 12 u |
- 2x1 =
- 2 u |
| After |
1x3 =
3 u |
3x1 =
3 u |
0.8 =
810 =
45 40% =
40100 =
25 Tina and Betty had the same amount of money in the end. Make the amount that each had in the end the same. LCM of 1 and 3 is 3.
Amount that Tina had more than Betty at first
= 15 u - 5 u
= 10 u
10 u = 130
1 u = 130 ÷ 10 = 13
Amount that Tina had in the end
= 3 u
= 3 x 13
= $39
Answer(s): $39
