\[\boxed{\mathbf{2.429}}\]
Пояснение.
Решение.
\[\textbf{а)}\ 1\ :3 = \frac{1}{3}\]
\[\textbf{б)}\ 1\ :\frac{1}{6} = 1 \cdot 6 = 6\]
\[\textbf{в)}\ 1\ :0,2 = 10\ :2 = 5\]
\[\textbf{г)}\ 1\ :0,7 = 10\ :7 = \frac{10}{7} = 1\frac{3}{7}\]
\[\textbf{д)}\ 1\ :\frac{7}{12} = \frac{12}{7} = 1\frac{5}{7}\]
\[\textbf{е)}\ 1\ :2\frac{1}{7} = 1\ :\frac{15}{7} = \frac{7}{15}\]
\[\textbf{ж)}\ 1\ :1,2 = 10\ :12 = \frac{10}{12} = \frac{5}{6}\]
\[\textbf{з)}\ 1\ :1,5 = 10\ :15 = \frac{10}{15} = \frac{2}{3}\]