Adam has 300 green stickers and blue stickers.
35% of them are green stickers and the rest are blue stickers.
When Adam buys more green stickers,
85% of the stickers are green stickers.
How many stickers does Adam buy?
|
Green |
Blue |
Before |
7 x 3 = 21 u |
13 x 3 = 39 u |
Change |
+ ? |
No change |
After |
17 x 13 = 221 u |
3 x 13 = 39 u |
35% =
35100 =
72085% =
85100 =
1720 The number of blue stickers remains unchanged.
Make the number of blue stickers the same using the LCM of 13 and 3.
LCM of 13 and 3 = 39
Total number of stickers at first
= 21 u + 39 u
= 60 u
60 u = 300
1 u = 300 ÷ 60 = 5
Number of stickers that Adam buys
= 221 u - 21 u
= 200 u
= 200 x 5
= 1000
Answer(s): 1000