The cost price of 21 articles is equal to selling price of 18 articles.find gain or loss percentage.
Options.
A) 45/3%  B) 10/3%  C) 40/3%  D) 20/3%  E) 50/3%
Cost Price of each article be Rs 1   Cost Price of 18 articles =Rs18 ,selling price of 18 articles =Rs 21.   Gain%=[(3/18)*100]%=50/3%   Answer is 50/3%.
<result>E</result>
The cost price of 21 articles is equal to selling price of 18 articles.find gain or loss percentage.