Irene had $455 more than Gabby. Irene spent 0.8 of her money and Gabby spent 10% of her money. In the end, Irene and Gabby had the same amount of money left. Find the amount of money that Irene had in the end.
| |
Irene |
Gabby |
Comparing Irene
and Gabby at first |
455 more |
|
| Before |
5x9 =
45 u |
10x1 =
10 u |
| Change |
- 4x9 =
- 36 u |
- 1x1 =
- 1 u |
| After |
1x9 =
9 u |
9x1 =
9 u |
0.8 =
810 =
45 10% =
10100 =
110 Irene and Gabby had the same amount of money in the end. Make the amount that each had in the end the same. LCM of 1 and 9 is 9.
Amount that Irene had more than Gabby at first
= 45 u - 10 u
= 35 u
35 u = 455
1 u = 455 ÷ 35 = 13
Amount that Irene had in the end
= 9 u
= 9 x 13
= $117
Answer(s): $117
