Adam has some blue stickers and red stickers.
The number of blue stickers is decreased by 25% to 57.
The number of red stickers is decreased by 40% to 99.
- How many stickers are there at first?
- How many stickers are there in the end?
|
Red |
Green |
Before |
100% |
100% |
Change |
- 25% |
- 40% |
After |
75% = 57 |
60% = 99 |
(a)
100% - 25% = 75%
75% of red stickers = 57
100% of red stickers =
5775 x 100 = 76
100% - 40% = 60%
60% of green stickers = 99
100% of green stickers =
9960 x 100 = 165
Number of stickers at first
= 100% of red stickers + 100% of green stickers
= 76 + 165
= 241
(b)
Number of stickers in the end
= 57 + 99
= 156
Answer(s): (a) 241; (b) 156