a) \frac{2}{9} = \frac{}{45} б) \frac{}{90} = \frac{1}{30} в) \frac{4}{8} = \frac{2}{} г) \frac{5}{100} = \frac{1}{}

1. $$a) \frac{2}{9} = \frac{10}{45}$$
2. $$б) \frac{3}{90} = \frac{1}{30}$$
3. $$в) \frac{4}{8} = \frac{2}{4}$$
4. $$г) \frac{5}{100} = \frac{1}{20}$$

Ответ:

1. $$\frac{10}{45}$$
2. $$\frac{3}{90}$$
3. $$\frac{2}{4}$$
4. $$\frac{1}{20}$$