Gillian had $180 less than Tina. Tina spent 0.8 of her money and Gillian spent 20% of her money. In the end, Tina and Gillian had the same amount of money left. Find the amount of money that Tina had at first.
| |
Gillian |
Tina |
Comparing Tina
and Gillian at first |
|
180 more |
| Before |
5x1 =
5 u |
5x4 =
20 u |
| Change |
- 1x1 =
- 1 u |
- 4x4 =
- 16 u |
| After |
4x1 =
4 u |
1x4 =
4 u |
0.8 =
810 =
45 20% =
20100 =
15 Gillian 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 4 is 4.
Amount that Gillian had less than Tina at first
= 20 u - 5 u
= 15 u
15 u = 180
1 u = 180 ÷ 15 = 12
Amount that Tina had at first
= 20 u
= 20 x 12
= $240
Answer(s): $240
