Well, [tex]\frac{2}{10}=\frac{1}{5}=\frac{3}{15}=\frac{4}{20}=\frac{5}{25}=\frac{n}{5n}[/tex] for every n integer.
[tex]\frac{3}{11}=\frac{6}{22}=\frac{9}{33}=\frac{12}{44}=\frac{15}{55}=\frac{3n}{11n}[/tex] for every n integer.
[tex]\frac{1}{12}=\frac{2}{24}=\frac{3}{36}=\frac{4}{48}=\frac{5}{60}=\frac{n}{12n}[/tex] for every n integer.