Ответ:
\(30:27=\frac{10}{9}\).
\(\frac{10}{9}-\frac{1}{3}=\frac{10}{9}-\frac{3}{9}=\frac{7}{9}\).
\(\frac{7}{9}\cdot2=\frac{14}{9}\).
\(-\frac{1}{7}+\frac{2}{5}=\frac{-5+14}{35}=\frac{9}{35}\).
\(\frac{14}{9}+\frac{9}{35}=\frac{490+81}{315}=\frac{571}{315}=1\frac{256}{315}\).
Ответ: \(1\frac{256}{315}\).
