Adam has some blue stickers and red stickers.
The number of blue stickers is increased by 25% to 85.
The number of red stickers is increased by 10% to 55.
- How many stickers are there at first?
- How many stickers are there in the end?
|
Blue |
Red |
Before |
100% |
100% |
Change |
+ 25% |
+ 10% |
After |
125% = 85 |
110% = 55 |
(a)
100% + 25% = 125%
125% of blue stickers = 85
100% of blue stickers =
85125 x 100 = 68
100% + 10% = 110%
110% of red stickers = 55
100% of red stickers =
55110 x 100 = 50
Number of stickers at first
= 100% of blue stickers + 100% of red stickers
= 68 + 50
= 118
(b)
Number of stickers in the end
= 85 + 55
= 140
Answer(s): (a) 118; (b) 140