In a box, there are some chikoos and starfruits. If 20 more starfruits are put into the box, the percentage of chikoos will decrease from 60% to 20%. How many chikoos are there in the box?
|
Chikoos |
Starfruits |
Before |
3x1 = 3 u |
2x1 = 2 u |
Change |
No change |
+ 20 |
After |
1x3 = 3 u |
4x3 = 12 u |
60% =
60100 =
35 20% =
20100 =
15 The number of chikoos remains unchanged at first and in the end. Make the number of chikoos the same. LCM of 3 and 1 is 3.
Number of starfruits added
= 12 u - 2 u
= 10 u
10 u = 20
1 u = 20 ÷ 10 = 2
Number of chikoos
= 3 u
= 3 x 2
= 6
Answer(s): 6