Adam has some blue stickers and green stickers.
The number of blue stickers is increased by 25% to 80.
The number of green stickers is increased by 40% to 63.
- How many stickers are there at first?
- How many stickers are there in the end?
|
Blue |
Green |
Before |
100% |
100% |
Change |
+ 25% |
+ 40% |
After |
125% = 80 |
140% = 63 |
(a)
100% + 25% = 125%
125% of blue stickers = 80
100% of blue stickers =
80125 x 100 = 64
100% + 40% = 140%
140% of green stickers = 63
100% of green stickers =
63140 x 100 = 45
Number of stickers at first
= 100% of blue stickers + 100% of green stickers
= 64 + 45
= 109
(b)
Number of stickers in the end
= 80 + 63
= 143
Answer(s): (a) 109; (b) 143