35 Winnie's money was equal to
23 of Erika's money at first. After Winnie spent $2.40 and Erika spent $0.60, Winnie had
23 as much money as Erika.
- How much did Erika have at first? Express your answer in 2 decimal places.
- How much did Winnie have in the end? Express your answer in 2 decimal places.
| |
Make p the same
(3)x3 |
Winnie
(1) |
Erika
(2) |
Make p the same
(4)x2 |
| Before |
30 u |
10 u |
9 u |
18 u |
| Change |
- 7.2 |
- 2.4 |
- 0.6 |
- 1.2 |
| After |
6 p |
2 p |
3p |
6 p |
35 Winnie's money =
23 Erika's money
610 Winnie's money =
69 Erika's money
Winnie's money : Erika's money = 10 : 9
(3) = (4)
30 u - 7.2 = 18 u - 1.2
30 u - 18 u = 7.2 - 1.2
12 u = 6
1 u = 0.5
Amount Erika has at first
= 9 u
= 9 x 0.5
= 4.5 (a)
Amount Winnie has in the end
= 10 u - 2.4
= (10 x 0.5) - 2.4
= 2.6 (b)
Answers: (a) $4.50; (b) $2.60
