Andy had 140 more stickers than Perry. Andy gave 20% of his stickers to Perry. Perry in return gave 50% of his stickers to Andy. In the end, Perry had 519 less stickers than Andy. How many stickers did Andy have at first?
| |
Andy |
Perry |
Comparing Andy
and Peter at first |
140 more |
|
| Before |
5 u + 140 |
5 u |
| Change 1 |
- 1 u - 28 |
+ 1 u + 28 |
| After 1 |
4 u + 112 |
6 u + 28 |
| Change 2 |
+ 3 u + 14 |
- 3 u - 14 |
| After 2 |
7 u + 126 |
3 u + 14 |
20% =
20100 =
1520% x 140
=
20100 x 140
= 28
50% x 28
=
50100 x 28
= 14
50% x 6 u
=
50100 x 6 u
= 3 u
Perry had 519 less stickers than Andy in the end. If another 519 stickers are given to Perry, both will have the same number of stickers.
7 u + 126 = 3 u + 14 + 519
7 u - 3 u = 14 + 519 - 126
4 u = 407
1 u = 407 ÷ 4 = 37
Number of Perry's stickers at first
= 5 u
= 5 x 37
= 185
Answer: 185
