Adam has 250 red stickers and green stickers.
60% of them are red stickers and the rest are green stickers.
When Adam buys more red stickers,
75% of the stickers are red stickers.
How many stickers does Adam buy?
|
Red |
Green |
Before |
3 x 1 = 3 u |
2 x 1 = 2 u |
Change |
+ ? |
No change |
After |
3 x 2 = 6 u |
1 x 2 = 2 u |
60% =
60100 =
3575% =
75100 =
34 The number of green stickers remains unchanged.
Make the number of green stickers the same using the LCM of 2 and 1.
LCM of 2 and 1 = 2
Total number of stickers at first
= 3 u + 2 u
= 5 u
5 u = 250
1 u = 250 ÷ 5 = 50
Number of stickers that Adam buys
= 6 u - 3 u
= 3 u
= 3 x 50
= 150
Answer(s): 150