Adam has some blue stickers and red stickers.
The number of blue stickers is decreased by 25% to 99.
The number of red stickers is decreased by 50% to 88.
- How many stickers are there at first?
- How many stickers are there in the end?
|
Red |
Green |
Before |
100% |
100% |
Change |
- 25% |
- 50% |
After |
75% = 99 |
50% = 88 |
(a)
100% - 25% = 75%
75% of red stickers = 99
100% of red stickers =
9975 x 100 = 132
100% - 50% = 50%
50% of green stickers = 88
100% of green stickers =
8850 x 100 = 176
Number of stickers at first
= 100% of red stickers + 100% of green stickers
= 132 + 176
= 308
(b)
Number of stickers in the end
= 99 + 88
= 187
Answer(s): (a) 308; (b) 187