Adam has 240 blue stickers and red stickers.
45% of them are blue stickers and the rest are red stickers.
When Adam buys more blue stickers,
75% of the stickers are blue stickers.
How many stickers does Adam buy?
|
Blue |
Red |
Before |
9 x 1 = 9 u |
11 x 1 = 11 u |
Change |
+ ? |
No change |
After |
3 x 11 = 33 u |
1 x 11 = 11 u |
45% =
45100 =
92075% =
75100 =
34 The number of red stickers remains unchanged.
Make the number of red stickers the same using the LCM of 11 and 1.
LCM of 11 and 1 = 11
Total number of stickers at first
= 9 u + 11 u
= 20 u
20 u = 240
1 u = 240 ÷ 20 = 12
Number of stickers that Adam buys
= 33 u - 9 u
= 24 u
= 24 x 12
= 288
Answer(s): 288