A bag marked at $240 is sold for $120. The rate of discount is?	Choose the correct choice.
A) 10%  B) 25%  C) 20%  D) 50%  E) 45%
Rate of discount = 120/240 * 100= 
<gadget id="calculator">120/240 * 100</gadget>
<output>50</output>
50%   Answer is 50%
<result>D</result>
A bag marked at $240 is sold for $120. The rate of discount is?