Adam has some green stickers and red stickers.
The number of green stickers is increased by 20% to 60.
The number of red stickers is increased by 50% to 84.
- How many stickers are there at first?
- How many stickers are there in the end?
|
Green |
Red |
Before |
100% |
100% |
Change |
+ 20% |
+ 50% |
After |
120% = 60 |
150% = 84 |
(a)
100% + 20% = 120%
120% of green stickers = 60
100% of green stickers =
60120 x 100 = 50
100% + 50% = 150%
150% of red stickers = 84
100% of red stickers =
84150 x 100 = 56
Number of stickers at first
= 100% of green stickers + 100% of red stickers
= 50 + 56
= 106
(b)
Number of stickers in the end
= 60 + 84
= 144
Answer(s): (a) 106; (b) 144