Adam has some blue stickers and red stickers.
The number of blue stickers is increased by 25% to 95.
The number of red stickers is decreased by 20% to 84.
- How many stickers are there at first?
- How many stickers are there in the end?
|
Red |
Blue |
Before |
100% |
100% |
Change |
+ 25% |
- 20% |
After |
125% = 95 |
80% = 84 |
(a)
100% - 25% = 125%
125% of red stickers = 95
100% of red stickers =
95125 x 100 = 76
100% - 20% = 80%
80% of blue stickers = 84
100% of blue stickers =
8480 x 100 = 105
Number of stickers at first
= 100% of red stickers + 100% of blue stickers
= 76 + 105
= 181
(b)
Number of stickers in the end
= 95 + 84
= 179
Answer(s): (a) 181; (b) 179