A man buys an article for $100. and sells it for $130. Find the gain percent? Choose the correct option:	A) 10%	B) 15%	C) 25%	D) 20%	E) 30%
C.P. = $100   S.P. = $130   Gain = $30   Gain% = 30/100 *100= 
<gadget id="calculator">30/100 *100</gadget>
<output>30</output>
30%   Answer is 30%
<result>E</result>
A man buys an article for $100. and sells it for $130. Find the gain percent?