Adam has some green stickers and red stickers.
The number of green stickers is increased by 25% to 90.
The number of red stickers is increased by 50% to 54.
- How many stickers are there at first?
- How many stickers are there in the end?
|
Green |
Red |
Before |
100% |
100% |
Change |
+ 25% |
+ 50% |
After |
125% = 90 |
150% = 54 |
(a)
100% + 25% = 125%
125% of green stickers = 90
100% of green stickers =
90125 x 100 = 72
100% + 50% = 150%
150% of red stickers = 54
100% of red stickers =
54150 x 100 = 36
Number of stickers at first
= 100% of green stickers + 100% of red stickers
= 72 + 36
= 108
(b)
Number of stickers in the end
= 90 + 54
= 144
Answer(s): (a) 108; (b) 144