Adam has some blue stickers and red stickers.
The number of blue stickers is decreased by 25% to 78.
The number of red stickers is decreased by 20% to 76.
- How many stickers are there at first?
- How many stickers are there in the end?
|
Blue |
Green |
Before |
100% |
100% |
Change |
- 25% |
- 20% |
After |
75% = 78 |
80% = 76 |
(a)
100% - 25% = 75%
75% of blue stickers = 78
100% of blue stickers =
7875 x 100 = 104
100% - 20% = 80%
80% of green stickers = 76
100% of green stickers =
7680 x 100 = 95
Number of stickers at first
= 100% of blue stickers + 100% of green stickers
= 104 + 95
= 199
(b)
Number of stickers in the end
= 78 + 76
= 154
Answer(s): (a) 199; (b) 154