Adam has some blue stickers and red stickers.
The number of blue stickers is decreased by 30% to 98.
The number of red stickers is decreased by 40% to 99.
- How many stickers are there at first?
- How many stickers are there in the end?
|
Green |
Red |
Before |
100% |
100% |
Change |
- 30% |
- 40% |
After |
70% = 98 |
60% = 99 |
(a)
100% - 30% = 70%
70% of green stickers = 98
100% of green stickers =
9870 x 100 = 140
100% - 40% = 60%
60% of red stickers = 99
100% of red stickers =
9960 x 100 = 165
Number of stickers at first
= 100% of green stickers + 100% of red stickers
= 140 + 165
= 305
(b)
Number of stickers in the end
= 98 + 99
= 197
Answer(s): (a) 305; (b) 197