Adam has some blue stickers and red stickers.
The number of blue stickers is increased by 25% to 55.
The number of red stickers is increased by 40% to 77.
- How many stickers are there at first?
- How many stickers are there in the end?
|
Blue |
Red |
Before |
100% |
100% |
Change |
+ 25% |
+ 40% |
After |
125% = 55 |
140% = 77 |
(a)
100% + 25% = 125%
125% of blue stickers = 55
100% of blue stickers =
55125 x 100 = 44
100% + 40% = 140%
140% of red stickers = 77
100% of red stickers =
77140 x 100 = 55
Number of stickers at first
= 100% of blue stickers + 100% of red stickers
= 44 + 55
= 99
(b)
Number of stickers in the end
= 55 + 77
= 132
Answer(s): (a) 99; (b) 132