Adam has some blue stickers and red stickers.
The number of blue stickers is increased by 25% to 95.
The number of red stickers is increased by 20% to 72.
- How many stickers are there at first?
- How many stickers are there in the end?
|
Blue |
Red |
Before |
100% |
100% |
Change |
+ 25% |
+ 20% |
After |
125% = 95 |
120% = 72 |
(a)
100% + 25% = 125%
125% of blue stickers = 95
100% of blue stickers =
95125 x 100 = 76
100% + 20% = 120%
120% of red stickers = 72
100% of red stickers =
72120 x 100 = 60
Number of stickers at first
= 100% of blue stickers + 100% of red stickers
= 76 + 60
= 136
(b)
Number of stickers in the end
= 95 + 72
= 167
Answer(s): (a) 136; (b) 167