Adam has some blue stickers and red stickers.
The number of blue stickers is increased by 30% to 91.
The number of red stickers is increased by 40% to 98.
- How many stickers are there at first?
- How many stickers are there in the end?
|
Blue |
Red |
Before |
100% |
100% |
Change |
+ 30% |
+ 40% |
After |
130% = 91 |
140% = 98 |
(a)
100% + 30% = 130%
130% of blue stickers = 91
100% of blue stickers =
91130 x 100 = 70
100% + 40% = 140%
140% of red stickers = 98
100% of red stickers =
98140 x 100 = 70
Number of stickers at first
= 100% of blue stickers + 100% of red stickers
= 70 + 70
= 140
(b)
Number of stickers in the end
= 91 + 98
= 189
Answer(s): (a) 140; (b) 189