851. Выполните вычитание: а) \(\frac{3}{5}-\frac{1}{5}\); б) \(\frac{7}{20}-\frac{3}{20}\); в) \(\frac{12}{16}-\frac{3}{16}\); г) \(\frac{16}{27}-\frac{8}{27}\).

1. а) \(\frac{3}{5}-\frac{1}{5}=\frac{3-1}{5}=\frac{2}{5}\).
2. б) \(\frac{7}{20}-\frac{3}{20}=\frac{7-3}{20}=\frac{4}{20}=\frac{1}{5}\).
3. в) \(\frac{12}{16}-\frac{3}{16}=\frac{9}{16}\).
4. г) \(\frac{16}{27}-\frac{8}{27}=\frac{8}{27}\).

Ответ: а) \(\frac{2}{5}\); б) \(\frac{1}{5}\); в) \(\frac{9}{16}\); г) \(\frac{8}{27}\).