Adam has some green stickers and blue stickers.
The number of green stickers is increased by 25% to 50.
The number of blue stickers is increased by 30% to 52.
- How many stickers are there at first?
- How many stickers are there in the end?
|
Green |
Blue |
Before |
100% |
100% |
Change |
+ 25% |
+ 30% |
After |
125% = 50 |
130% = 52 |
(a)
100% + 25% = 125%
125% of green stickers = 50
100% of green stickers =
50125 x 100 = 40
100% + 30% = 130%
130% of blue stickers = 52
100% of blue stickers =
52130 x 100 = 40
Number of stickers at first
= 100% of green stickers + 100% of blue stickers
= 40 + 40
= 80
(b)
Number of stickers in the end
= 50 + 52
= 102
Answer(s): (a) 80; (b) 102