[tex]a) \ 2,13:\frac{1}{5} = \frac{213}{100}\cdot\frac{5}{1} =\frac{213}{20} =10\frac{13}{20} =10,65\\\\b) \ 0,72:1\frac{2}{7} = \frac{72}{100}:\frac{9}{7} = \frac{18}{25}\cdot\frac{7}{9} = \frac{14}{25} = 0,56[/tex]
