Adam has some blue stickers and red stickers.
The number of blue stickers is increased by 40% to 91.
The number of red stickers is decreased by 50% to 70.
- How many stickers are there at first?
- How many stickers are there in the end?
|
Green |
Blue |
Before |
100% |
100% |
Change |
+ 40% |
- 50% |
After |
140% = 91 |
50% = 70 |
(a)
100% - 40% = 140%
140% of green stickers = 91
100% of green stickers =
91140 x 100 = 65
100% - 50% = 50%
50% of blue stickers = 70
100% of blue stickers =
7050 x 100 = 140
Number of stickers at first
= 100% of green stickers + 100% of blue stickers
= 65 + 140
= 205
(b)
Number of stickers in the end
= 91 + 70
= 161
Answer(s): (a) 205; (b) 161