$$\frac{2}{11} = \frac{2 \cdot 2}{11 \cdot 2} = \frac{4}{22}$$; $$\frac{2}{11} = \frac{2 \cdot 5}{11 \cdot 5} = \frac{10}{55}$$; $$\frac{2}{11} = \frac{2 \cdot 3}{11 \cdot 3} = \frac{6}{33}$$; $$\frac{2}{11} = \frac{2 \cdot 4}{11 \cdot 4} = \frac{8}{44}$$