Adam has some blue stickers and red stickers.
The number of blue stickers is decreased by 40% to 60.
The number of red stickers is decreased by 50% to 99.
- How many stickers are there at first?
- How many stickers are there in the end?
|
Blue |
Green |
Before |
100% |
100% |
Change |
- 40% |
- 50% |
After |
60% = 60 |
50% = 99 |
(a)
100% - 40% = 60%
60% of blue stickers = 60
100% of blue stickers =
6060 x 100 = 100
100% - 50% = 50%
50% of green stickers = 99
100% of green stickers =
9950 x 100 = 198
Number of stickers at first
= 100% of blue stickers + 100% of green stickers
= 100 + 198
= 298
(b)
Number of stickers in the end
= 60 + 99
= 159
Answer(s): (a) 298; (b) 159