Abi had
38 as much money as Tammy. Abi had $40 less than Tammy. Abi spent some money to buy a birthday present for her neighbour. In the end, she had
14 as much money as Tammy. How much did Abi spend on the birthday present?
|
Abi |
Tammy |
Before |
3 u |
8 u |
Change |
- ? |
|
After |
1 p |
4 p |
Amount that Abi had less than Tammy
= 8 u - 3 u
= 5 u
5 u = 40
1 u = 40 ÷ 5 = 8
Amount that Abi had at first
= 3 u
= 3 x 8
= $24
Amount that Tammy had
= 8 u
= 8 x 8
= $64
The amount that Tammy had at first and in the end remains the same.
8 u = 4 p
4 p = 64
1 p = 64 ÷ 4 = 16
Amount that Abi had in the end
= 1 p
= $16
Amount that Abi spent on the birthday present
= 24 - 16
= $8
Answer(s): $8