Pamela had
49 as much money as Irene. Pamela had $50 less than Irene. Pamela spent some money to buy a birthday present for her uncle. In the end, she had
16 as much money as Irene. How much did Pamela spend on the birthday present?
| |
Pamela |
Irene |
| Before |
4 u |
9 u |
| Change |
- ? |
|
| After |
1 p |
6 p |
Amount that Pamela had less than Irene
= 9 u - 4 u
= 5 u
5 u = 50
1 u = 50 ÷ 5 = 10
Amount that Pamela had at first
= 4 u
= 4 x 10
= $40
Amount that Irene had
= 9 u
= 9 x 10
= $90
The amount that Irene had at first and in the end remains the same.
9 u = 6 p
6 p = 90
1 p = 90 ÷ 6 = 15
Amount that Pamela had in the end
= 1 p
= $15
Amount that Pamela spent on the birthday present
= 40 - 15
= $25
Answer(s): $25
