Risa had
25 as much money as Tammy. Risa received another $306 from her neighbour. In the end, Risa's money became 2
23 of what Tammy had. How much did Risa have at first?
|
Risa |
Tammy |
Before |
2x3 = 6 u |
5x3 = 15 u |
Change |
+ $306 |
|
After |
8x5 = 40 u |
3x5 = 15 u |
2
23 =
83The amount that Tammy had at first and in the end remains unchanged. Make the amount that Tammy had the same. LCM of 3 and 5 is 15.
Amount that Risa received
= 40 u - 6 u
= 34 u
34 u = 306
1 u = 306 ÷ 34 = 9
Amount that Risa had at first
= 6 u
= 6 x 9
= $54
Answer(s): $54