35 Lucy's money was equal to
23 of Usha's money at first. After Lucy spent $1.70 and Usha spent $0.90, Lucy had
45 as much money as Usha.
- How much did Usha have at first? Express your answer in 2 decimal places.
- How much did Lucy have in the end? Express your answer in 2 decimal places.
| |
Make p the same
(3)x5 |
Lucy
(1) |
Usha
(2) |
Make p the same
(4)x4 |
| Before |
50 u |
10 u |
9 u |
36 u |
| Change |
- 8.5 |
- 1.7 |
- 0.9 |
- 3.6 |
| After |
20 p |
4 p |
5p |
20 p |
35 Lucy's money =
23 Usha's money
610 Lucy's money =
69 Usha's money
Lucy's money : Usha's money = 10 : 9
(3) = (4)
50 u - 8.5 = 36 u - 3.6
50 u - 36 u = 8.5 - 3.6
14 u = 4.9
1 u = 0.35
Amount Usha has at first
= 9 u
= 9 x 0.35
= 3.15 (a)
Amount Lucy has in the end
= 10 u - 1.7
= (10 x 0.35) - 1.7
= 1.8 (b)
Answers: (a) $3.15; (b) $1.80
