Usha had
37 as much money as Abi. Usha had $36 less than Abi. Usha spent some money to buy a birthday present for her friend. In the end, she had
13 as much money as Abi. How much did Usha spend on the birthday present?
| |
Usha |
Abi |
| Before |
3 u |
7 u |
| Change |
- ? |
|
| After |
1 p |
3 p |
Amount that Usha had less than Abi
= 7 u - 3 u
= 4 u
4 u = 36
1 u = 36 ÷ 4 = 9
Amount that Usha had at first
= 3 u
= 3 x 9
= $27
Amount that Abi had
= 7 u
= 7 x 9
= $63
The amount that Abi had at first and in the end remains the same.
7 u = 3 p
3 p = 63
1 p = 63 ÷ 3 = 21
Amount that Usha had in the end
= 1 p
= $21
Amount that Usha spent on the birthday present
= 27 - 21
= $6
Answer(s): $6
