45 Hilda's money was equal to
25 of Irene's money at first. After Hilda spent $1.60 and Irene spent $0.70, Hilda had
25 as much money as Irene.
- How much did Irene have at first? Express your answer in 2 decimal places.
- How much did Hilda have in the end? Express your answer in 2 decimal places.
| |
Make p the same
(3)x5 |
Hilda
(1) |
Irene
(2) |
Make p the same
(4)x2 |
| Before |
25 u |
5 u |
10 u |
20 u |
| Change |
- 8 |
- 1.6 |
- 0.7 |
- 1.4 |
| After |
10 p |
2 p |
5p |
10 p |
45 Hilda's money =
25 Irene's money
45 Hilda's money =
410 Irene's money
Hilda's money : Irene's money = 5 : 10
(3) = (4)
25 u - 8 = 20 u - 1.4
25 u - 20 u = 8 - 1.4
5 u = 6.6
1 u = 1.32
Amount Irene has at first
= 10 u
= 10 x 1.32
= 13.2 (a)
Amount Hilda has in the end
= 5 u - 1.6
= (5 x 1.32) - 1.6
= 5 (b)
Answers: (a) $13.20; (b) $5.00
