Adam has some blue stickers and red stickers.
The number of blue stickers is decreased by 25% to 66.
The number of red stickers is decreased by 50% to 81.
- How many stickers are there at first?
- How many stickers are there in the end?
|
Blue |
Green |
Before |
100% |
100% |
Change |
- 25% |
- 50% |
After |
75% = 66 |
50% = 81 |
(a)
100% - 25% = 75%
75% of blue stickers = 66
100% of blue stickers =
6675 x 100 = 88
100% - 50% = 50%
50% of green stickers = 81
100% of green stickers =
8150 x 100 = 162
Number of stickers at first
= 100% of blue stickers + 100% of green stickers
= 88 + 162
= 250
(b)
Number of stickers in the end
= 66 + 81
= 147
Answer(s): (a) 250; (b) 147