Adam has 110 red stickers and blue stickers.
70% 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 |
7 x 11 = 77 u |
3 x 11 = 33 u |
Change |
- ? |
No change |
After |
9 x 3 = 27 u |
11 x 3 = 33 u |
70% =
70100 =
71045% =
45100 =
920 The number of blue stickers remains unchanged.
Make the number of blue stickers the same using the LCM of 3 and 11.
LCM of 3 and 11 = 33
Total number of stickers at first
= 77 u + 33 u
= 110 u
110 u = 110
1 u = 110 ÷ 110 = 1
Number of stickers that Adam gives away
= 77 u - 27 u
= 50 u
= 50 x 1
= 50
Answer(s): 50