Rachel had
310 as much money as Nora. Rachel had $42 less than Nora. Rachel spent some money to buy a birthday present for her neighbour. In the end, she had
15 as much money as Nora. How much did Rachel spend on the birthday present?
| |
Rachel |
Nora |
| Before |
3 u |
10 u |
| Change |
- ? |
|
| After |
1 p |
5 p |
Amount that Rachel had less than Nora
= 10 u - 3 u
= 7 u
7 u = 42
1 u = 42 ÷ 7 = 6
Amount that Rachel had at first
= 3 u
= 3 x 6
= $18
Amount that Nora had
= 10 u
= 10 x 6
= $60
The amount that Nora had at first and in the end remains the same.
10 u = 5 p
5 p = 60
1 p = 60 ÷ 5 = 12
Amount that Rachel had in the end
= 1 p
= $12
Amount that Rachel spent on the birthday present
= 18 - 12
= $6
Answer(s): $6
