The C.P of 21 articles is equal to S.P of 18 articles. Find the gain or loss percent.
Choose the correct answer.
A) 10%	B) 18 1/3%	C) 16 2/3 %	D) 20%	E) 30%
Let C.P of each article be Re. 1.   Then C.P of 18 articles = Rs. 18,   S.P of 18 articles = Rs. 21.   Gain % = ( 3/18 * 100 ) % = 16 2/3   ANSWER:16 2/3 %
<result>C</result>
The C.P of 21 articles is equal to S.P of 18 articles. Find the gain or loss percent.