Adam has some blue stickers and red stickers.
The number of blue stickers is increased by 40% to 84.
The number of red stickers is decreased by 50% to 77.
- How many stickers are there at first?
- How many stickers are there in the end?
|
Red |
Blue |
Before |
100% |
100% |
Change |
+ 40% |
- 50% |
After |
140% = 84 |
50% = 77 |
(a)
100% - 40% = 140%
140% of red stickers = 84
100% of red stickers =
84140 x 100 = 60
100% - 50% = 50%
50% of blue stickers = 77
100% of blue stickers =
7750 x 100 = 154
Number of stickers at first
= 100% of red stickers + 100% of blue stickers
= 60 + 154
= 214
(b)
Number of stickers in the end
= 84 + 77
= 161
Answer(s): (a) 214; (b) 161