6. Calculate gain or loss percentage of whole transaction

A man sold two mobile's for \(₹\)9310 each. He sold one at a gain of 28\(\%\) and the other at a loss of 28\(\%\). Find his gain or loss percentage in the whole transaction.

 

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

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