A drug dealer uses 800gm in place of 1kg to sell his goods. Find his actual % profit or loss, when he sells his article his article on 20% gain on cost price?	Choices
A) 32.5%	B) 37.5%	C) 35%	D) 40%	E) 50%
Selling price of 800gm = 100+20= 
<gadget id="calculator">100+20</gadget>
<output>120</output>
$120   Profit= 120-80= 
<gadget id="calculator">120-80</gadget>
<output>40</output>
$40   % of profit= 40*100/80= 
<gadget id="calculator">40*100/80</gadget>
<output>50</output>
50 %   Answer is 50%
<result>E</result>
A drug dealer uses 800gm in place of 1kg to sell his goods. Find his actual % profit or loss, when he sells his article his article on 20% gain on cost price?