Решение:

1. \(\frac{1}{6} = \frac{1 \cdot 7}{6 \cdot 7} = \frac{7}{42}\)
2. \(\frac{3}{7} = \frac{3 \cdot 6}{7 \cdot 6} = \frac{18}{42}\)
3. \(\frac{5}{14} = \frac{5 \cdot 3}{14 \cdot 3} = \frac{15}{42}\)
4. \(\frac{2}{3} = \frac{2 \cdot 14}{3 \cdot 14} = \frac{28}{42}\)
5. \(\frac{16}{21} = \frac{16 \cdot 2}{21 \cdot 2} = \frac{32}{42}\)
6. \(\frac{1}{2} = \frac{1 \cdot 21}{2 \cdot 21} = \frac{21}{42}\)

Ответ:

1. \(\frac{7}{42}\)
2. \(\frac{18}{42}\)
3. \(\frac{15}{42}\)
4. \(\frac{28}{42}\)
5. \(\frac{32}{42}\)
6. \(\frac{21}{42}\)