в) \(\frac{12}{60}, \frac{99}{22}, \frac{5}{100}, \frac{20}{1000}\).

Решение:

в) Сократим дроби:

• $$\frac{12}{60} = \frac{12 \cdot 1}{12 \cdot 5} = \frac{1}{5}$$
• $$\frac{99}{22} = \frac{11 \cdot 9}{11 \cdot 2} = \frac{9}{2}$$
• $$\frac{5}{100} = \frac{5 \cdot 1}{5 \cdot 20} = \frac{1}{20}$$
• $$\frac{20}{1000} = \frac{20 \cdot 1}{20 \cdot 50} = \frac{1}{50}$$

Ответ: $$\frac{1}{5}, \frac{9}{2}, \frac{1}{20}, \frac{1}{50}$$.