Adam has some blue stickers and red stickers.
The number of blue stickers is decreased by 20% to 92.
The number of red stickers is decreased by 40% to 60.
- How many stickers are there at first?
- How many stickers are there in the end?
|
Green |
Blue |
Before |
100% |
100% |
Change |
- 20% |
- 40% |
After |
80% = 92 |
60% = 60 |
(a)
100% - 20% = 80%
80% of green stickers = 92
100% of green stickers =
9280 x 100 = 115
100% - 40% = 60%
60% of blue stickers = 60
100% of blue stickers =
6060 x 100 = 100
Number of stickers at first
= 100% of green stickers + 100% of blue stickers
= 115 + 100
= 215
(b)
Number of stickers in the end
= 92 + 60
= 152
Answer(s): (a) 215; (b) 152