Adam has some blue stickers and green stickers.
The number of blue stickers is increased by 10% to 99.
The number of green stickers is increased by 40% to 63.
- How many stickers are there at first?
- How many stickers are there in the end?
|
Blue |
Green |
Before |
100% |
100% |
Change |
+ 10% |
+ 40% |
After |
110% = 99 |
140% = 63 |
(a)
100% + 10% = 110%
110% of blue stickers = 99
100% of blue stickers =
99110 x 100 = 90
100% + 40% = 140%
140% of green stickers = 63
100% of green stickers =
63140 x 100 = 45
Number of stickers at first
= 100% of blue stickers + 100% of green stickers
= 90 + 45
= 135
(b)
Number of stickers in the end
= 99 + 63
= 162
Answer(s): (a) 135; (b) 162