Adam has some blue stickers and red stickers.
The number of blue stickers is increased by 35% to 54.
The number of red stickers is decreased by 50% to 52.
- How many stickers are there at first?
- How many stickers are there in the end?
|
Blue |
Red |
Before |
100% |
100% |
Change |
+ 35% |
- 50% |
After |
135% = 54 |
50% = 52 |
(a)
100% - 35% = 135%
135% of blue stickers = 54
100% of blue stickers =
54135 x 100 = 40
100% - 50% = 50%
50% of red stickers = 52
100% of red stickers =
5250 x 100 = 104
Number of stickers at first
= 100% of blue stickers + 100% of red stickers
= 40 + 104
= 144
(b)
Number of stickers in the end
= 54 + 52
= 106
Answer(s): (a) 144; (b) 106