Adam has some blue stickers and green stickers.
The number of blue stickers is increased by 25% to 75.
The number of green stickers is increased by 50% to 72.
- How many stickers are there at first?
- How many stickers are there in the end?
|
Blue |
Green |
Before |
100% |
100% |
Change |
+ 25% |
+ 50% |
After |
125% = 75 |
150% = 72 |
(a)
100% + 25% = 125%
125% of blue stickers = 75
100% of blue stickers =
75125 x 100 = 60
100% + 50% = 150%
150% of green stickers = 72
100% of green stickers =
72150 x 100 = 48
Number of stickers at first
= 100% of blue stickers + 100% of green stickers
= 60 + 48
= 108
(b)
Number of stickers in the end
= 75 + 72
= 147
Answer(s): (a) 108; (b) 147