Adam has some blue stickers and red stickers.
The number of blue stickers is decreased by 25% to 54.
The number of red stickers is decreased by 30% to 98.
- How many stickers are there at first?
- How many stickers are there in the end?
|
Red |
Blue |
Before |
100% |
100% |
Change |
- 25% |
- 30% |
After |
75% = 54 |
70% = 98 |
(a)
100% - 25% = 75%
75% of red stickers = 54
100% of red stickers =
5475 x 100 = 72
100% - 30% = 70%
70% of blue stickers = 98
100% of blue stickers =
9870 x 100 = 140
Number of stickers at first
= 100% of red stickers + 100% of blue stickers
= 72 + 140
= 212
(b)
Number of stickers in the end
= 54 + 98
= 152
Answer(s): (a) 212; (b) 152