Adam has some blue stickers and red stickers.
The number of blue stickers is decreased by 25% to 66.
The number of red stickers is decreased by 10% to 54.
- How many stickers are there at first?
- How many stickers are there in the end?
|
Green |
Blue |
Before |
100% |
100% |
Change |
- 25% |
- 10% |
After |
75% = 66 |
90% = 54 |
(a)
100% - 25% = 75%
75% of green stickers = 66
100% of green stickers =
6675 x 100 = 88
100% - 10% = 90%
90% of blue stickers = 54
100% of blue stickers =
5490 x 100 = 60
Number of stickers at first
= 100% of green stickers + 100% of blue stickers
= 88 + 60
= 148
(b)
Number of stickers in the end
= 66 + 54
= 120
Answer(s): (a) 148; (b) 120