Ram professes to sell his goods at the cost price but he made use of 900 grms instead of a kg, what is the gain percent?	Select the correct option
A) 21 1/9%  B) 61 1/9%  C) 11 1/9%  D) 31 1/9%  E) 81 1/9%
Explanation:   900 --- 100   100 --- ? =&gt; 11 1/9%   Answer: 11 1/9%
<result>C</result>
Ram professes to sell his goods at the cost price but he made use of 900 grms instead of a kg, what is the gain percent?