Adam has 220 green stickers and red stickers.
40% of them are green stickers and the rest are red stickers.
When Adam buys more green stickers,
90% of the stickers are green stickers.
How many stickers does Adam buy?
|
Green |
Red |
Before |
2 x 1 = 2 u |
3 x 1 = 3 u |
Change |
+ ? |
No change |
After |
9 x 3 = 27 u |
1 x 3 = 3 u |
40% =
40100 =
2590% =
90100 =
910 The number of red stickers remains unchanged.
Make the number of red stickers the same using the LCM of 3 and 1.
LCM of 3 and 1 = 3
Total number of stickers at first
= 2 u + 3 u
= 5 u
5 u = 220
1 u = 220 ÷ 5 = 44
Number of stickers that Adam buys
= 27 u - 2 u
= 25 u
= 25 x 44
= 1100
Answer(s): 1100