A person bought apples at 10 for $1 and sold them at 4 for $1. Find his gain or loss percent?  Choices.
A) 150%	B) -100%	C) 100%	D) -50%	E) 50%
Number of bananas bought = L.C.M of 10 and 4 = 20   C.P. = 1/10 * 20= 
<gadget id="calculator">1/10 * 20</gadget>
<output>2</output>
$2   S.P.= 1/4 * 20= 
<gadget id="calculator">1/4 * 20</gadget>
<output>5</output>
$5   Gain%= 3/2 * 100= 
<gadget id="calculator">3/2 * 100</gadget>
<output>150</output>
150%   150%nswer is 150%
<result>A</result>
A person bought apples at 10 for $1 and sold them at 4 for $1. Find his gain or loss percent?