A man buys an article for 10% less than its value and sells it for 10% more than its value. His gain or loss percent is:	Choose the correct option:
A) no profit, no loss
B) 20% profit
C) less than 20% profit
D) more than 20% profit
E) None
Let the article be worth Rs. x.   C.P. 90% of Rs. x = Rs. 9x/10   S.P. = 110% of Rs. x = Rs. 11x/10   Gain = (11x/10 - 9x/10) = Rs. x/5   Gain % = x/5 * 10/9x * 100 = 22 2/9 % &gt; 20%   ANSWER:more than 20% profit
<result>D</result>
A man buys an article for 10% less than its value and sells it for 10% more than its value. His gain or loss percent is: