Adam has some blue stickers and red stickers.
The number of blue stickers is decreased by 35% to 78.
The number of red stickers is decreased by 30% to 63.
- How many stickers are there at first?
- How many stickers are there in the end?
|
Red |
Blue |
Before |
100% |
100% |
Change |
- 35% |
- 30% |
After |
65% = 78 |
70% = 63 |
(a)
100% - 35% = 65%
65% of red stickers = 78
100% of red stickers =
7865 x 100 = 120
100% - 30% = 70%
70% of blue stickers = 63
100% of blue stickers =
6370 x 100 = 90
Number of stickers at first
= 100% of red stickers + 100% of blue stickers
= 120 + 90
= 210
(b)
Number of stickers in the end
= 78 + 63
= 141
Answer(s): (a) 210; (b) 141