45 Cindy's money was equal to
25 of Hilda's money at first. After Cindy spent $2.20 and Hilda spent $0.80, Cindy had
25 as much money as Hilda.
- How much did Hilda have at first? Express your answer in 2 decimal places.
- How much did Cindy have in the end? Express your answer in 2 decimal places.
| |
Make p the same
(3)x5 |
Cindy
(1) |
Hilda
(2) |
Make p the same
(4)x2 |
| Before |
25 u |
5 u |
10 u |
20 u |
| Change |
- 11 |
- 2.2 |
- 0.8 |
- 1.6 |
| After |
10 p |
2 p |
5p |
10 p |
45 Cindy's money =
25 Hilda's money
45 Cindy's money =
410 Hilda's money
Cindy's money : Hilda's money = 5 : 10
(3) = (4)
25 u - 11 = 20 u - 1.6
25 u - 20 u = 11 - 1.6
5 u = 9.4
1 u = 1.88
Amount Hilda has at first
= 10 u
= 10 x 1.88
= 18.8 (a)
Amount Cindy has in the end
= 5 u - 2.2
= (5 x 1.88) - 2.2
= 7.2 (b)
Answers: (a) $18.80; (b) $7.20
