Adam has some blue stickers and red stickers.
The number of blue stickers is decreased by 20% to 52.
The number of red stickers is decreased by 50% to 56.
- How many stickers are there at first?
- How many stickers are there in the end?
|
Green |
Red |
Before |
100% |
100% |
Change |
- 20% |
- 50% |
After |
80% = 52 |
50% = 56 |
(a)
100% - 20% = 80%
80% of green stickers = 52
100% of green stickers =
5280 x 100 = 65
100% - 50% = 50%
50% of red stickers = 56
100% of red stickers =
5650 x 100 = 112
Number of stickers at first
= 100% of green stickers + 100% of red stickers
= 65 + 112
= 177
(b)
Number of stickers in the end
= 52 + 56
= 108
Answer(s): (a) 177; (b) 108