Adam has some blue stickers and red stickers.
The number of blue stickers is increased by 40% to 63.
The number of red stickers is increased by 20% to 96.
- How many stickers are there at first?
- How many stickers are there in the end?
|
Blue |
Red |
Before |
100% |
100% |
Change |
+ 40% |
+ 20% |
After |
140% = 63 |
120% = 96 |
(a)
100% + 40% = 140%
140% of blue stickers = 63
100% of blue stickers =
63140 x 100 = 45
100% + 20% = 120%
120% of red stickers = 96
100% of red stickers =
96120 x 100 = 80
Number of stickers at first
= 100% of blue stickers + 100% of red stickers
= 45 + 80
= 125
(b)
Number of stickers in the end
= 63 + 96
= 159
Answer(s): (a) 125; (b) 159