What is the value of the expression $\frac{3}{11}-\frac{1}{5}$ is $\frac{3}{55}$.

Make the denominators of the two fractions equal. This can be done by multiplying the numerator and denominator of the fraction $\frac{3}{11}$ by 5.

Thus, the fraction$\frac{3}{11}$ becomes $\frac{3\times 5}{11\times 5}=\frac{15}{55}$

Similarly, the numerator and denominator of the fraction $\frac{1}{5}$ need to be multiplied by 11.

Thus, the fraction $\frac{1}{5}$ becomes $\frac{1\times 11}{5\times 11}=\frac{11}{55}$