Adam has 100 blue stickers and green stickers.
55% of them are blue stickers and the rest are green stickers.
When Adam buys more blue stickers,
80% of the stickers are blue stickers.
How many stickers does Adam buy?
|
Blue |
Green |
Before |
11 x 1 = 11 u |
9 x 1 = 9 u |
Change |
+ ? |
No change |
After |
4 x 9 = 36 u |
1 x 9 = 9 u |
55% =
55100 =
112080% =
80100 =
45 The number of green stickers remains unchanged.
Make the number of green stickers the same using the LCM of 9 and 1.
LCM of 9 and 1 = 9
Total number of stickers at first
= 11 u + 9 u
= 20 u
20 u = 100
1 u = 100 ÷ 20 = 5
Number of stickers that Adam buys
= 36 u - 11 u
= 25 u
= 25 x 5
= 125
Answer(s): 125