A shopkeeper sells two watches for Rs. 308 each. On one he gets 12% profit and on the other 12% loss. His profit or loss in the entire transaction was -

$$\eqalign{ & {\text{loss }}\% \cr & = {\left( {\frac{{{\text{Common Loss and Gain}}\% }}{{10}}} \right)^2}\% \cr & = {\left( {\frac{{12}}{{10}}} \right)^2}\% \cr & = \frac{{36}}{{25}}\% \cr & = {\text{1}}\frac{{11}}{{25}}\% \cr & = {\text{1}}\frac{{11}}{{25}}\% {\text{ loss}}{\text{}} \cr} $$