Adam has some blue stickers and red stickers.
The number of blue stickers is increased by 25% to 55.
The number of red stickers is decreased by 50% to 80.
- How many stickers are there at first?
- How many stickers are there in the end?
|
Green |
Blue |
Before |
100% |
100% |
Change |
+ 25% |
- 50% |
After |
125% = 55 |
50% = 80 |
(a)
100% - 25% = 125%
125% of green stickers = 55
100% of green stickers =
55125 x 100 = 44
100% - 50% = 50%
50% of blue stickers = 80
100% of blue stickers =
8050 x 100 = 160
Number of stickers at first
= 100% of green stickers + 100% of blue stickers
= 44 + 160
= 204
(b)
Number of stickers in the end
= 55 + 80
= 135
Answer(s): (a) 204; (b) 135