Joelle had $500 less than Tina. Tina spent 0.8 of her money and Joelle spent 30% of her money. In the end, Tina and Joelle had the same amount of money left. Find the amount of money that Tina had at first.
| |
Joelle |
Tina |
Comparing Tina
and Joelle at first |
|
500 more |
| Before |
10x1 =
10 u |
5x7 =
35 u |
| Change |
- 3x1 =
- 3 u |
- 4x7 =
- 28 u |
| After |
7x1 =
7 u |
1x7 =
7 u |
0.8 =
810 =
45 30% =
30100 =
310 Joelle and Tina 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 Joelle had less than Tina at first
= 35 u - 10 u
= 25 u
25 u = 500
1 u = 500 ÷ 25 = 20
Amount that Tina had at first
= 35 u
= 35 x 20
= $700
Answer(s): $700
