\(1 \frac{3}{5} = \frac{1 \cdot 5 + 3}{5} = \frac{8}{5}\)
\(1 \frac{3}{8} = \frac{1 \cdot 8 + 3}{8} = \frac{11}{8}\)
\(\frac{3}{4} + \frac{11}{8}\)
\(\frac{3 \cdot 2}{4 \cdot 2} + \frac{11}{8} = \frac{6}{8} + \frac{11}{8} = \frac{6 + 11}{8} = \frac{17}{8}\)
\(\frac{8}{5} \cdot \frac{17}{8}\)
\(\frac{8}{5} \cdot \frac{17}{8} = \frac{\cancel{8}}{5} \cdot \frac{17}{\cancel{8}} = \frac{17}{5}\)
\(\frac{17}{5} = 3 \frac{2}{5}\)
Ответ: 3 2/5