An article is sold at a certain price. By selling it at 2/3 of that price one loses 10%. Find the gain percent at original price. Options:
A) 15%  B) 35%  C) 25%  D) 50%  E) 30%
Let the original S.P be Rs. X. Then new S.P = Rs. 2/3 X, Loss =10%   So C.P = Rs. [100/90*2/3 X ] = 20 X/27.   Now C.P = Rs. 20X/27, S.P =Rs. X, Gain = Rs. [ X -20X/27 ] =Rs.7X/27.   Gain % = [ 7X/27 *27/20X *100 ]% =35%   ANSWER:35%7 /27 *27/20  *100= 
<gadget id="calculator">7 /27 *27/20  *100</gadget>
<output>35</output>
35%   ANSWER:35%
<result>B</result>
An article is sold at a certain price. By selling it at 2/3 of that price one loses 10%. Find the gain percent at original price.