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