Adam has some red stickers and blue stickers.
The number of red stickers is increased by 25% to 65.
The number of blue stickers is increased by 40% to 56.
- How many stickers are there at first?
- How many stickers are there in the end?
|
Red |
Blue |
Before |
100% |
100% |
Change |
+ 25% |
+ 40% |
After |
125% = 65 |
140% = 56 |
(a)
100% + 25% = 125%
125% of red stickers = 65
100% of red stickers =
65125 x 100 = 52
100% + 40% = 140%
140% of blue stickers = 56
100% of blue stickers =
56140 x 100 = 40
Number of stickers at first
= 100% of red stickers + 100% of blue stickers
= 52 + 40
= 92
(b)
Number of stickers in the end
= 65 + 56
= 121
Answer(s): (a) 92; (b) 121