Adam has some blue stickers and red stickers.
The number of blue stickers is decreased by 30% to 63.
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?
|
Blue |
Red |
Before |
100% |
100% |
Change |
- 30% |
- 40% |
After |
70% = 63 |
60% = 63 |
(a)
100% - 30% = 70%
70% of blue stickers = 63
100% of blue stickers =
6370 x 100 = 90
100% - 40% = 60%
60% of red stickers = 63
100% of red stickers =
6360 x 100 = 105
Number of stickers at first
= 100% of blue stickers + 100% of red stickers
= 90 + 105
= 195
(b)
Number of stickers in the end
= 63 + 63
= 126
Answer(s): (a) 195; (b) 126