Adam has 330 red stickers and blue stickers.
80% of them are red stickers and the rest are blue stickers.
When Adam gives away some red stickers,
45% of the remaining stickers are red stickers.
How many stickers does Adam give away?
|
Red |
Blue |
Before |
4 x 11 = 44 u |
1 x 11 = 11 u |
Change |
- ? |
No change |
After |
9 x 1 = 9 u |
11 x 1 = 11 u |
80% =
80100 =
4545% =
45100 =
920 The number of blue stickers remains unchanged.
Make the number of blue stickers the same using the LCM of 1 and 11.
LCM of 1 and 11 = 11
Total number of stickers at first
= 44 u + 11 u
= 55 u
55 u = 330
1 u = 330 ÷ 55 = 6
Number of stickers that Adam gives away
= 44 u - 9 u
= 35 u
= 35 x 6
= 210
Answer(s): 210