13. Calculate gain or loss percentage of whole transtraction

A man sold two mobile's for \(₹\)10853 each. He sold one at a gain of 15\(\%\) and the other at a loss of 15\(\%\). Find his gain or loss percentage in the whole transaction.

 

The total gain or loss percentage \(=\) \(\%\).

[Note: Submit the answer as a whole number].