35 Cathy's money was equal to
25 of Pamela's money at first. After Cathy spent $2.20 and Pamela spent $0.70, Cathy had
25 as much money as Pamela.
- How much did Pamela have at first? Express your answer in 2 decimal places.
- How much did Cathy have in the end? Express your answer in 2 decimal places.
| |
Make p the same
(3)x5 |
Cathy
(1) |
Pamela
(2) |
Make p the same
(4)x2 |
| Before |
50 u |
10 u |
15 u |
30 u |
| Change |
- 11 |
- 2.2 |
- 0.7 |
- 1.4 |
| After |
10 p |
2 p |
5p |
10 p |
35 Cathy's money =
25 Pamela's money
610 Cathy's money =
615 Pamela's money
Cathy's money : Pamela's money = 10 : 15
(3) = (4)
50 u - 11 = 30 u - 1.4
50 u - 30 u = 11 - 1.4
20 u = 9.6
1 u = 0.48
Amount Pamela has at first
= 15 u
= 15 x 0.48
= 7.2 (a)
Amount Cathy has in the end
= 10 u - 2.2
= (10 x 0.48) - 2.2
= 2.6 (b)
Answers: (a) $7.20; (b) $2.60
