45 Eva's money was equal to
25 of Abi's money at first. After Eva spent $1.80 and Abi spent $0.70, Eva had
25 as much money as Abi.
- How much did Abi have at first? Express your answer in 2 decimal places.
- How much did Eva have in the end? Express your answer in 2 decimal places.
|
Make p the same (3)x5 |
Eva (1) |
Abi (2) |
Make p the same (4)x2 |
Before |
25 u |
5 u |
10 u |
20 u |
Change |
- 9 |
- 1.8 |
- 0.7 |
- 1.4 |
After |
10 p |
2 p |
5p |
10 p |
45 Eva's money =
25 Abi's money
45 Eva's money =
410 Abi's money
Eva's money : Abi's money = 5 : 10
(3) = (4)
25 u - 9 = 20 u - 1.4
25 u - 20 u = 9 - 1.4
5 u = 7.6
1 u = 1.52
Amount Abi has at first
= 10 u
= 10 x 1.52
= 15.2 (a)
Amount Eva has in the end
= 5 u - 1.8
= (5 x 1.52) - 1.8
= 5.8 (b)
Answers: (a) $15.20; (b) $5.80