An article is bought for Rs.600 and sold for Rs.900, find the gain percent?	Pick one:  A) 33 1/7%  B) 33 1/6%  C) 50%  D) 38 1/3%  E) 33 2/3%
600 ---- 300   100 ---- ? =&gt; 50%   Answer:50%
<result>C</result>
An article is bought for Rs.600 and sold for Rs.900, find the gain percent?