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