Adam has some blue stickers and red stickers.
The number of blue stickers is decreased by 40% to 96.
The number of red stickers is decreased by 10% to 81.
- How many stickers are there at first?
- How many stickers are there in the end?
|
Blue |
Green |
Before |
100% |
100% |
Change |
- 40% |
- 10% |
After |
60% = 96 |
90% = 81 |
(a)
100% - 40% = 60%
60% of blue stickers = 96
100% of blue stickers =
9660 x 100 = 160
100% - 10% = 90%
90% of green stickers = 81
100% of green stickers =
8190 x 100 = 90
Number of stickers at first
= 100% of blue stickers + 100% of green stickers
= 160 + 90
= 250
(b)
Number of stickers in the end
= 96 + 81
= 177
Answer(s): (a) 250; (b) 177