Adam has some green stickers and blue stickers.
The number of green stickers is increased by 5% to 63.
The number of blue stickers is increased by 50% to 78.
- How many stickers are there at first?
- How many stickers are there in the end?
|
Green |
Blue |
Before |
100% |
100% |
Change |
+ 5% |
+ 50% |
After |
105% = 63 |
150% = 78 |
(a)
100% + 5% = 105%
105% of green stickers = 63
100% of green stickers =
63105 x 100 = 60
100% + 50% = 150%
150% of blue stickers = 78
100% of blue stickers =
78150 x 100 = 52
Number of stickers at first
= 100% of green stickers + 100% of blue stickers
= 60 + 52
= 112
(b)
Number of stickers in the end
= 63 + 78
= 141
Answer(s): (a) 112; (b) 141