25% of David's savings was $27 more than 30% of Reggie's savings. After David spent
14 of his savings and Reggie spent 40% of his savings, David had $111 more than Reggie. How much was David's saving at first?
|
Reggie |
David |
Before |
10 u |
12 u + 108 |
Change |
- 4 u |
- 3 u - 27 |
After |
6 u |
9 u + 81 |
Comparing Reggie and David in the end |
|
111 more |
25% =
25100 =
14 30% =
30100 =
310 14 David =
310 Reggie + 27
Make the numerators the same. LCM of 1 and 3 is 3.
1x34x3 David =
3x110x1 Reggie + 27
312 David =
310 Reggie + 27
Simplify the fractions.
112 David =
110 Reggie + 9
Let
110 Reggie be
1 u.
Reggie's savings at first = 10 u
112 David =
110 Reggie + 9
Let
112 David be
1 u + 9.
David's savings at first
= 12 x (1 u + 9)
= 12 u + 108
Savings that Reggie spent
= 40% x 10 u
=
40100 x 10 u
= 4 u
Savings that David spent
=
14 x (12 u + 108)
= 3 u + 27
David had $111 more than Reggie in the end. If another $111 was given to Reggie, the amount that each had in the end would be the same.
9 u + 81 = 6 u + 111
9 u - 6 u = 111 - 81
3 u = 30
1 u = 30 ÷ 3 = 10
Savings that David had at first
= 12 u + 108
= 12 x 10 + 108
= 120 + 108
= $228
Answer(s): $228