Yen and Lucy had the same amount of money at first. After Yen gave $300 to her son, Lucy had 7 times as much money as Yen. How much did Yen have in the end?
| |
Yen |
Lucy |
| Before |
1x7 =
7 u |
1x7 =
7 u |
| Change |
- $300 |
|
| After |
1 u |
7 u |
The amount that Lucy had at first and in the end remains unchanged. Make the amount that Lucy had the same. LCM of 1 and 7 is 7.
Amount that Yen gave to her son
= 7 u - 1 u
= 6 u
6 u = 300
1 u = 300 ÷ 6 = 50
Amount that Yen had in the end
= 1 u
= $300
Answer(s): $300
