Adam has some blue stickers and red stickers.
The number of blue stickers is decreased by 20% to 76.
The number of red stickers is decreased by 50% to 84.
- How many stickers are there at first?
- How many stickers are there in the end?
|
Blue |
Green |
Before |
100% |
100% |
Change |
- 20% |
- 50% |
After |
80% = 76 |
50% = 84 |
(a)
100% - 20% = 80%
80% of blue stickers = 76
100% of blue stickers =
7680 x 100 = 95
100% - 50% = 50%
50% of green stickers = 84
100% of green stickers =
8450 x 100 = 168
Number of stickers at first
= 100% of blue stickers + 100% of green stickers
= 95 + 168
= 263
(b)
Number of stickers in the end
= 76 + 84
= 160
Answer(s): (a) 263; (b) 160