Ответ:

\(\frac{11}{12}+\frac{2}{15}=\frac{55}{60}+\frac{8}{60}=\frac{63}{60}=\frac{21}{20}\).

\(\frac{3}{10}+\frac{3}{4}=\frac{6}{20}+\frac{15}{20}=\frac{21}{20}\).

Ответ: \(\frac{11}{12}+\frac{2}{15}=\frac{3}{10}+\frac{3}{4}\).