Adam has 270 red stickers and blue stickers.
40% of them are red stickers and the rest are blue stickers.
When Adam buys more red stickers,
90% of the stickers are red stickers.
How many stickers does Adam buy?
|
Red |
Blue |
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 blue stickers remains unchanged.
Make the number of blue 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 = 270
1 u = 270 ÷ 5 = 54
Number of stickers that Adam buys
= 27 u - 2 u
= 25 u
= 25 x 54
= 1350
Answer(s): 1350