Adam has some blue stickers and red stickers.
The number of blue stickers is decreased by 5% to 57.
The number of red stickers is decreased by 40% to 63.
- How many stickers are there at first?
- How many stickers are there in the end?
|
Red |
Green |
Before |
100% |
100% |
Change |
- 5% |
- 40% |
After |
95% = 57 |
60% = 63 |
(a)
100% - 5% = 95%
95% of red stickers = 57
100% of red stickers =
5795 x 100 = 60
100% - 40% = 60%
60% of green stickers = 63
100% of green stickers =
6360 x 100 = 105
Number of stickers at first
= 100% of red stickers + 100% of green stickers
= 60 + 105
= 165
(b)
Number of stickers in the end
= 57 + 63
= 120
Answer(s): (a) 165; (b) 120