Adam has 260 green stickers and red stickers.
90% of them are green stickers and the rest are red stickers.
When Adam gives away some green stickers,
35% of the remaining stickers are green stickers.
How many stickers does Adam give away?
|
Green |
Red |
Before |
9 x 13 = 117 u |
1 x 13 = 13 u |
Change |
- ? |
No change |
After |
7 x 1 = 7 u |
13 x 1 = 13 u |
90% =
90100 =
91035% =
35100 =
720 The number of red stickers remains unchanged.
Make the number of red stickers the same using the LCM of 1 and 13.
LCM of 1 and 13 = 13
Total number of stickers at first
= 117 u + 13 u
= 130 u
130 u = 260
1 u = 260 ÷ 130 = 2
Number of stickers that Adam gives away
= 117 u - 7 u
= 110 u
= 110 x 2
= 220
Answer(s): 220