Usha had $480 less than Eric. Eric spent 0.7 of his money and Usha spent 0.3 of her money. In the end, Eric and Usha had the same amount of money left. Find the amount of money Usha had at first.
| |
Usha |
Eric |
Difference |
| Before |
30 u |
70 u |
40 u |
| Change |
- 3 u |
- 7 u |
|
| After |
21 u |
21 u |
|
0.7 =
710 Fraction of Eric's amount left
= 1 -
710 =
310 0.3 =
310 Fraction of Usha's amount left
= 1 -
310 =
710 The amount that Eric and Usha each had in the end is the same. Make the numerators the same. LCM of 3 and 7 is 21.
310 of Eric's amount =
710 of Usha's amount
2170 of Eric's amount =
2130 of Usha's amount
Amount that Usha had less than Eric
= 70 u - 30 u
= 40 u
40 u = 480
1 u = 480 ÷ 40 = 12
Amount that Usha had at first
= 30 u
= 30 x 12
= $360
Answer(s): $360
