Risa had
25 as much money as Yoko. Risa received another $370 from her mother. In the end, Risa's money became 2
14 of what Yoko had. How much did Risa have at first?
| |
Risa |
Yoko |
| Before |
2x4 =
8 u |
5x4 =
20 u |
| Change |
+ $370 |
|
| After |
9x5 =
45 u |
4x5 =
20 u |
2
14 =
94The amount that Yoko had at first and in the end remains unchanged. Make the amount that Yoko had the same. LCM of 4 and 5 is 20.
Amount that Risa received
= 45 u - 8 u
= 37 u
37 u = 370
1 u = 370 ÷ 37 = 10
Amount that Risa had at first
= 8 u
= 8 x 10
= $80
Answer(s): $80
