Adam has 360 red stickers and green stickers.
45% of them are red stickers and the rest are green stickers.
When Adam buys more red stickers,
70% of the stickers are red stickers.
How many stickers does Adam buy?
|
Red |
Green |
Before |
9 x 3 = 27 u |
11 x 3 = 33 u |
Change |
+ ? |
No change |
After |
7 x 11 = 77 u |
3 x 11 = 33 u |
45% =
45100 =
92070% =
70100 =
710 The number of green stickers remains unchanged.
Make the number of green stickers the same using the LCM of 11 and 3.
LCM of 11 and 3 = 33
Total number of stickers at first
= 27 u + 33 u
= 60 u
60 u = 360
1 u = 360 ÷ 60 = 6
Number of stickers that Adam buys
= 77 u - 27 u
= 50 u
= 50 x 6
= 300
Answer(s): 300