Adam has some blue stickers and green stickers.
The number of blue stickers is increased by 30% to 52.
The number of green stickers is increased by 20% to 54.
- How many stickers are there at first?
- How many stickers are there in the end?
|
Blue |
Green |
Before |
100% |
100% |
Change |
+ 30% |
+ 20% |
After |
130% = 52 |
120% = 54 |
(a)
100% + 30% = 130%
130% of blue stickers = 52
100% of blue stickers =
52130 x 100 = 40
100% + 20% = 120%
120% of green stickers = 54
100% of green stickers =
54120 x 100 = 45
Number of stickers at first
= 100% of blue stickers + 100% of green stickers
= 40 + 45
= 85
(b)
Number of stickers in the end
= 52 + 54
= 106
Answer(s): (a) 85; (b) 106