Adam has some blue stickers and red stickers.
The number of blue stickers is increased by 10% to 55.
The number of red stickers is decreased by 40% to 96.
- How many stickers are there at first?
- How many stickers are there in the end?
|
Red |
Blue |
Before |
100% |
100% |
Change |
+ 10% |
- 40% |
After |
110% = 55 |
60% = 96 |
(a)
100% - 10% = 110%
110% of red stickers = 55
100% of red stickers =
55110 x 100 = 50
100% - 40% = 60%
60% of blue stickers = 96
100% of blue stickers =
9660 x 100 = 160
Number of stickers at first
= 100% of red stickers + 100% of blue stickers
= 50 + 160
= 210
(b)
Number of stickers in the end
= 55 + 96
= 151
Answer(s): (a) 210; (b) 151