Adam has 120 green stickers and blue stickers.
35% of them are green stickers and the rest are blue stickers.
When Adam buys more green stickers,
90% of the stickers are green stickers.
How many stickers does Adam buy?
|
Green |
Blue |
Before |
7 x 1 = 7 u |
13 x 1 = 13 u |
Change |
+ ? |
No change |
After |
9 x 13 = 117 u |
1 x 13 = 13 u |
35% =
35100 =
72090% =
90100 =
910 The number of blue stickers remains unchanged.
Make the number of blue stickers the same using the LCM of 13 and 1.
LCM of 13 and 1 = 13
Total number of stickers at first
= 7 u + 13 u
= 20 u
20 u = 120
1 u = 120 ÷ 20 = 6
Number of stickers that Adam buys
= 117 u - 7 u
= 110 u
= 110 x 6
= 660
Answer(s): 660