Adam has some blue stickers and green stickers.
The number of blue stickers is increased by 20% to 78.
The number of green stickers is increased by 50% to 96.
- How many stickers are there at first?
- How many stickers are there in the end?
|
Blue |
Green |
Before |
100% |
100% |
Change |
+ 20% |
+ 50% |
After |
120% = 78 |
150% = 96 |
(a)
100% + 20% = 120%
120% of blue stickers = 78
100% of blue stickers =
78120 x 100 = 65
100% + 50% = 150%
150% of green stickers = 96
100% of green stickers =
96150 x 100 = 64
Number of stickers at first
= 100% of blue stickers + 100% of green stickers
= 65 + 64
= 129
(b)
Number of stickers in the end
= 78 + 96
= 174
Answer(s): (a) 129; (b) 174