Adam has some blue stickers and red stickers.
The number of blue stickers is increased by 25% to 60.
The number of red stickers is decreased by 50% to 86.
- 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% = 60 |
50% = 86 |
(a)
100% - 25% = 125%
125% of blue stickers = 60
100% of blue stickers =
60125 x 100 = 48
100% - 50% = 50%
50% of green stickers = 86
100% of green stickers =
8650 x 100 = 172
Number of stickers at first
= 100% of blue stickers + 100% of green stickers
= 48 + 172
= 220
(b)
Number of stickers in the end
= 60 + 86
= 146
Answer(s): (a) 220; (b) 146