By selling 50 meters of cloth. I gain the selling price of 10 meters. Find the gain percent? Choose the correct choice from the following answers:
A) 42 7/7%  B) 42 5/8%  C) 42 6/4%  D) 42 6/8%  E) 25%
SP = CP + g   50 SP = 50 CP + 10 SP   40 SP = 50 CP   40 --- 10 CP gain   100 --- ? =&gt; 25%   Answer: 25%
<result>E</result>
By selling 50 meters of cloth. I gain the selling price of 10 meters. Find the gain percent?