A fruit-seller buys x guava for Rs. y andsells y guavas for Rs. x. If x > y, the he made

A

$$\frac{x^{2}-y^{2}}{xy}$$ % loss

B

$$\frac{x^{2}-y^{2}}{xy}$$ % gain

C

$$\frac{x^{2}-y^{2}}{y^{2}}$$ % loss

D

$$\frac{x^{2}-y^{2}}{y^{2}}$$ % gain