Adam has 400 blue stickers and green stickers.
40% of them are blue stickers and the rest are green stickers.
When Adam buys more blue stickers,
75% of the stickers are blue stickers.
How many stickers does Adam buy?
|
Blue |
Green |
Before |
2 x 1 = 2 u |
3 x 1 = 3 u |
Change |
+ ? |
No change |
After |
3 x 3 = 9 u |
1 x 3 = 3 u |
40% =
40100 =
2575% =
75100 =
34 The number of green stickers remains unchanged.
Make the number of green stickers the same using the LCM of 3 and 1.
LCM of 3 and 1 = 3
Total number of stickers at first
= 2 u + 3 u
= 5 u
5 u = 400
1 u = 400 ÷ 5 = 80
Number of stickers that Adam buys
= 9 u - 2 u
= 7 u
= 7 x 80
= 560
Answer(s): 560