By selling an article for $225 a person gains $75. What is the gain %?	Choose the most appropriate option.
A) 25%  B) 30%  C) 50%  D) 20%  E) 10%
S.P. = $225   Gain = $75   C.P. = 225-75= 
<gadget id="calculator">225-75</gadget>
<output>150</output>
150   Gain%= 75/150 * 100= 
<gadget id="calculator">75/150 * 100</gadget>
<output>50</output>
50%   Answer is 50%
<result>C</result>
By selling an article for $225 a person gains $75. What is the gain %?