a)
[tex]0.6 = \frac{6}{10} = \frac{3}{5} \\ \\ 0.9 = \frac{9}{10}[/tex]
[tex]0.4 = \frac{4}{10} = \frac{2}{5} [/tex]
b)
[tex]0.35 = \frac{35}{100} = \frac{7}{20} \\ \\ 0.13 = \frac{13}{100} [/tex]
[tex]0.48 = \frac{48}{100} = \frac{12}{25} [/tex]
c)
[tex]0.017 = \frac{17}{1000} \\ \\ 0.006 = \frac{6}{1000} = \frac{3}{500} [/tex]
[tex]0.045 = \frac{45}{1000} = \frac{9}{200} [/tex]