Adam has some blue stickers and red stickers.
The number of blue stickers is decreased by 30% to 56.
The number of red stickers is decreased by 50% to 96.
- How many stickers are there at first?
- How many stickers are there in the end?
|
Green |
Red |
Before |
100% |
100% |
Change |
- 30% |
- 50% |
After |
70% = 56 |
50% = 96 |
(a)
100% - 30% = 70%
70% of green stickers = 56
100% of green stickers =
5670 x 100 = 80
100% - 50% = 50%
50% of red stickers = 96
100% of red stickers =
9650 x 100 = 192
Number of stickers at first
= 100% of green stickers + 100% of red stickers
= 80 + 192
= 272
(b)
Number of stickers in the end
= 56 + 96
= 152
Answer(s): (a) 272; (b) 152