A trader marks his books 30% more than the cost price. If he allows 20% discount, then find his gain or loss percent?	Select the correct option:
A) 4% Gain  B) 12% loss  C) 4% loss  D) No profit No loss  E) None of these
Let CP of an book = 100   MP of an book = 130   Discount 20 % on 130 = 26   SP of the book = 130 - 26= 
<gadget id="calculator">130 - 26</gadget>
<output>104</output>
104   Gain= 4%   4% Gainnswer : 4% Gain
<result>A</result>
A trader marks his books 30% more than the cost price. If he allows 20% discount, then find his gain or loss percent?