a) \(0.4=\frac{4}{10}\); \(0.7=\frac{7}{10}\); \(0.93=\frac{93}{100}\); \(1.2=1\frac{2}{10}=\frac{12}{10}\); \(4.125=4\frac{125}{1000}=\frac{4125}{1000}\)
b) \(\frac{1}{4}=\frac{25}{100}\); \(\frac{4}{25}=\frac{16}{100}\); \(\frac{3}{5}=\frac{6}{10}\); \(\frac{5}{8}=\frac{625}{1000}\)