A coconut merchant finds that the cost price of 2750 coconuts is the same as the selling price of 2500 coconuts. His loss or gain will be = ?

According to the question,
2750 Cost Price = 2500 Selling Price
$$\eqalign{ & \frac{{{\text{CP}}}}{{{\text{SP}}}} = \frac{{2500}}{{2750}} = \left. {\frac{{10}}{{11}}} \right\rangle {\text{1 unit profit}} \cr & {\text{Profit}}\% = \frac{1}{{10}} \times 100 \cr & \,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\, = 10\% {\text{ gain}} \cr} $$