Adam has some blue stickers and red stickers.
The number of blue stickers is decreased by 35% to 78.
The number of red stickers is decreased by 10% to 72.
- How many stickers are there at first?
- How many stickers are there in the end?
|
Blue |
Green |
Before |
100% |
100% |
Change |
- 35% |
- 10% |
After |
65% = 78 |
90% = 72 |
(a)
100% - 35% = 65%
65% of blue stickers = 78
100% of blue stickers =
7865 x 100 = 120
100% - 10% = 90%
90% of green stickers = 72
100% of green stickers =
7290 x 100 = 80
Number of stickers at first
= 100% of blue stickers + 100% of green stickers
= 120 + 80
= 200
(b)
Number of stickers in the end
= 78 + 72
= 150
Answer(s): (a) 200; (b) 150