Adam has some blue stickers and red stickers.
The number of blue stickers is decreased by 40% to 99.
The number of red stickers is decreased by 50% to 82.
- How many stickers are there at first?
- How many stickers are there in the end?
|
Red |
Blue |
Before |
100% |
100% |
Change |
- 40% |
- 50% |
After |
60% = 99 |
50% = 82 |
(a)
100% - 40% = 60%
60% of red stickers = 99
100% of red stickers =
9960 x 100 = 165
100% - 50% = 50%
50% of blue stickers = 82
100% of blue stickers =
8250 x 100 = 164
Number of stickers at first
= 100% of red stickers + 100% of blue stickers
= 165 + 164
= 329
(b)
Number of stickers in the end
= 99 + 82
= 181
Answer(s): (a) 329; (b) 181