Adam has some blue stickers and red stickers.
The number of blue stickers is increased by 35% to 81.
The number of red stickers is increased by 50% to 87.
- How many stickers are there at first?
- How many stickers are there in the end?
|
Blue |
Red |
Before |
100% |
100% |
Change |
+ 35% |
+ 50% |
After |
135% = 81 |
150% = 87 |
(a)
100% + 35% = 135%
135% of blue stickers = 81
100% of blue stickers =
81135 x 100 = 60
100% + 50% = 150%
150% of red stickers = 87
100% of red stickers =
87150 x 100 = 58
Number of stickers at first
= 100% of blue stickers + 100% of red stickers
= 60 + 58
= 118
(b)
Number of stickers in the end
= 81 + 87
= 168
Answer(s): (a) 118; (b) 168