Adam has 170 green stickers and blue stickers.
30% 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 |
3 x 1 = 3 u |
7 x 1 = 7 u |
Change |
+ ? |
No change |
After |
9 x 7 = 63 u |
1 x 7 = 7 u |
30% =
30100 =
31090% =
90100 =
910 The number of blue stickers remains unchanged.
Make the number of blue stickers the same using the LCM of 7 and 1.
LCM of 7 and 1 = 7
Total number of stickers at first
= 3 u + 7 u
= 10 u
10 u = 170
1 u = 170 ÷ 10 = 17
Number of stickers that Adam buys
= 63 u - 3 u
= 60 u
= 60 x 17
= 1020
Answer(s): 1020