Adam has some blue stickers and red stickers.
The number of blue stickers is decreased by 25% to 51.
The number of red stickers is decreased by 50% to 79.
- 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% = 51 |
50% = 79 |
(a)
100% - 25% = 75%
75% of blue stickers = 51
100% of blue stickers =
5175 x 100 = 68
100% - 50% = 50%
50% of green stickers = 79
100% of green stickers =
7950 x 100 = 158
Number of stickers at first
= 100% of blue stickers + 100% of green stickers
= 68 + 158
= 226
(b)
Number of stickers in the end
= 51 + 79
= 130
Answer(s): (a) 226; (b) 130