Adam has some blue stickers and red stickers.
The number of blue stickers is decreased by 25% to 69.
The number of red stickers is decreased by 50% to 66.
- How many stickers are there at first?
- How many stickers are there in the end?
|
Red |
Blue |
Before |
100% |
100% |
Change |
- 25% |
- 50% |
After |
75% = 69 |
50% = 66 |
(a)
100% - 25% = 75%
75% of red stickers = 69
100% of red stickers =
6975 x 100 = 92
100% - 50% = 50%
50% of blue stickers = 66
100% of blue stickers =
6650 x 100 = 132
Number of stickers at first
= 100% of red stickers + 100% of blue stickers
= 92 + 132
= 224
(b)
Number of stickers in the end
= 69 + 66
= 135
Answer(s): (a) 224; (b) 135