_______ is a rational number between $\frac{12}{11} and \frac{14}{11}$ 

Rational number between $$\frac{12}{11} and \frac{14}{11}$$ is $$\frac{13}{11}$$ 

Hence, $$\frac{13}{11}$$is a rational number between $$\frac{12}{11} and \frac{14}{11}$$