Adam has 240 blue stickers and red stickers.
35% of them are blue stickers and the rest are red stickers.
When Adam buys more blue stickers,
85% of the stickers are blue stickers.
How many stickers does Adam buy?
|
Blue |
Red |
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 red stickers remains unchanged.
Make the number of red 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 = 240
1 u = 240 ÷ 60 = 4
Number of stickers that Adam buys
= 221 u - 21 u
= 200 u
= 200 x 4
= 800
Answer(s): 800