[tex]a. \\
\frac{13}{12}=\frac{12}{12}+\frac{1}{12}=\boxed{1 \frac{1}{12}} \\ \\
b. \\
\frac{20}{3}=\frac{18}{3}+\frac{2}{3}=\boxed{6 \frac{2}{3}} \\ \\
c. \\
\frac{9}{4}=\frac{8}{4}+\frac{1}{4}=\boxed{2\frac{1}{4}} \\ \\
d. \\
\frac{19}{5}=\frac{15}{5}+\frac{4}{5}=\boxed{3 \frac{4}{5}} \\ \\
e. \\
\frac{28}{6}=\frac{14}{3}=\frac{12}{3}+\frac{2}{3}=\boxed{4 \frac{2}{3}}[/tex]