$$\frac{5}{3}\cdot\frac{5}{5}-\frac{6}{5}$$
To write -65 as a fraction with a common denominator, multiply by 33.$$\frac{5}{3}\cdot\frac{5}{5}-\frac{6}{5}\cdot\frac{3}{3}$$
Write each expression with a common denominator of 15, by multiplying each by an appropriate factor of 1.$$\frac{5\cdot5}{15}-\frac{6\cdot3}{15}$$
Combine the numerators over the common denominator.$$\frac{5\cdot5-6\cdot3}{15}$$
Simplify the numerator.$$\frac{7}{15}$$