Adam has some blue stickers and red stickers.
The number of blue stickers is increased by 25% to 85.
The number of red stickers is decreased by 50% to 54.
- How many stickers are there at first?
- How many stickers are there in the end?
|
Blue |
Green |
Before |
100% |
100% |
Change |
+ 25% |
- 50% |
After |
125% = 85 |
50% = 54 |
(a)
100% - 25% = 125%
125% of blue stickers = 85
100% of blue stickers =
85125 x 100 = 68
100% - 50% = 50%
50% of green stickers = 54
100% of green stickers =
5450 x 100 = 108
Number of stickers at first
= 100% of blue stickers + 100% of green stickers
= 68 + 108
= 176
(b)
Number of stickers in the end
= 85 + 54
= 139
Answer(s): (a) 176; (b) 139