[tex]a) \ \frac{1}{4} = \frac{1\cdot25}{4\cdot25} = \frac{25}{100} = 0,25\\\\b) \ 4\frac{1}{5} = 4\frac{1\cdot2}{5\cdot2} = 4\frac{1}{10} = 4,1\\\\c) \ 7\frac{3}{4} = 7\frac{3\cdot25}{4\cdot25} = 7\frac{75}{100} = 7,75\\\\d) \ 4\frac{3}{20} = 4\frac{3\cdot5}{20\cdot5} = 4\frac{15}{100} = 4,15[/tex]
