Решение:
- \( 0,4 = \frac{4}{10} = \frac{2}{5} \)
- \( 0,72 = \frac{72}{100} = \frac{18}{25} \)
- \( 0,35 = \frac{35}{100} = \frac{7}{20} \)
- \( 0,92 = \frac{92}{100} = \frac{23}{25} \)
- \( 0,632 = \frac{632}{1000} = \frac{158}{250} = \frac{79}{125} \)
- \( 0,9724 = \frac{9724}{10000} = \frac{2431}{2500} \)
Ответ: 1) \( \frac{2}{5} \); 2) \( \frac{18}{25} \); 3) \( \frac{7}{20} \); 4) \( \frac{23}{25} \); 5) \( \frac{79}{125} \); 6) \( \frac{2431}{2500} \).