A trader marks his books 20% more than the cost price. If he allows 20% discount, then find his gain or loss percent? Pick one
A) 2% profit	B) 2% loss	C) 4% loss	D) No profit No loss	E) None of these
4% loss   Let 4% lossP of an book = $100   MP= $120   Discount = 20%   SP = M[(100 - d%)/100] = 120(80/100) = $96   4% losslearly, the trader gets 4% loss.
<result>C</result>
A trader marks his books 20% more than the cost price. If he allows 20% discount, then find his gain or loss percent?