45 Zoe's money was equal to
23 of Ivory's money at first. After Zoe spent $2.40 and Ivory spent $0.80, Zoe had
25 as much money as Ivory.
- How much did Ivory have at first? Express your answer in 2 decimal places.
- How much did Zoe have in the end? Express your answer in 2 decimal places.
|
Make p the same (3)x5 |
Zoe (1) |
Ivory (2) |
Make p the same (4)x2 |
Before |
25 u |
5 u |
6 u |
12 u |
Change |
- 12 |
- 2.4 |
- 0.8 |
- 1.6 |
After |
10 p |
2 p |
5p |
10 p |
45 Zoe's money =
23 Ivory's money
45 Zoe's money =
46 Ivory's money
Zoe's money : Ivory's money = 5 : 6
(3) = (4)
25 u - 12 = 12 u - 1.6
25 u - 12 u = 12 - 1.6
13 u = 10.4
1 u = 0.8
Amount Ivory has at first
= 6 u
= 6 x 0.8
= 4.8 (a)
Amount Zoe has in the end
= 5 u - 2.4
= (5 x 0.8) - 2.4
= 1.6 (b)
Answers: (a) $4.80; (b) $1.60