Adam has 400 red stickers and green stickers.
85% of them are red stickers and the rest are green stickers.
When Adam gives away some red stickers,
60% of the remaining stickers are red stickers.
How many stickers does Adam give away?
|
Red |
Green |
Before |
17 x 2 = 34 u |
3 x 2 = 6 u |
Change |
- ? |
No change |
After |
3 x 3 = 9 u |
2 x 3 = 6 u |
85% =
85100 =
172060% =
60100 =
35 The number of green stickers remains unchanged.
Make the number of green stickers the same using the LCM of 3 and 2.
LCM of 3 and 2 = 6
Total number of stickers at first
= 34 u + 6 u
= 40 u
40 u = 400
1 u = 400 ÷ 40 = 10
Number of stickers that Adam gives away
= 34 u - 9 u
= 25 u
= 25 x 10
= 250
Answer(s): 250