Adam has some blue stickers and green stickers.
The number of blue stickers is increased by 25% to 70.
The number of green stickers is increased by 10% to 77.
- How many stickers are there at first?
- How many stickers are there in the end?
|
Blue |
Green |
Before |
100% |
100% |
Change |
+ 25% |
+ 10% |
After |
125% = 70 |
110% = 77 |
(a)
100% + 25% = 125%
125% of blue stickers = 70
100% of blue stickers =
70125 x 100 = 56
100% + 10% = 110%
110% of green stickers = 77
100% of green stickers =
77110 x 100 = 70
Number of stickers at first
= 100% of blue stickers + 100% of green stickers
= 56 + 70
= 126
(b)
Number of stickers in the end
= 70 + 77
= 147
Answer(s): (a) 126; (b) 147