45 Winnie's money was equal to
25 of Zara's money at first. After Winnie spent $1.70 and Zara spent $0.60, Winnie had
25 as much money as Zara.
- How much did Zara 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)x5 |
Winnie (1) |
Zara (2) |
Make p the same (4)x2 |
Before |
25 u |
5 u |
10 u |
20 u |
Change |
- 8.5 |
- 1.7 |
- 0.6 |
- 1.2 |
After |
10 p |
2 p |
5p |
10 p |
45 Winnie's money =
25 Zara's money
45 Winnie's money =
410 Zara's money
Winnie's money : Zara's money = 5 : 10
(3) = (4)
25 u - 8.5 = 20 u - 1.2
25 u - 20 u = 8.5 - 1.2
5 u = 7.3
1 u = 1.46
Amount Zara has at first
= 10 u
= 10 x 1.46
= 14.6 (a)
Amount Winnie has in the end
= 5 u - 1.7
= (5 x 1.46) - 1.7
= 5.6 (b)
Answers: (a) $14.60; (b) $5.60