A gunstore uses 400gm of powder in place of 1kg for their bullets. Find the actual % profit or loss, when the bullets are sold pending on 10% gain on cost price?
Choices: A) 32.5% B) 87.5% C) 35% D) 40% E) 50%
Selling price of 400gm = 100+10= 
<gadget id="calculator">100+10</gadget>
<output>110</output>
$110   Profit= 110-40= 
<gadget id="calculator">110-40</gadget>
<output>70</output>
$70   % of profit= 70*100/80= 
<gadget id="calculator">70*100/80</gadget>
<output>175/2 = around 87.5</output>
87.5 %   Answer is 87.5%
<result>B</result>
A gunstore uses 400gm of powder in place of 1kg for their bullets. Find the actual % profit or loss, when the bullets are sold pending on 10% gain on cost price?