Question

помогите пожалуйста ​

Answer 1

$\frac{1}{5} =\frac{1*2}{5*2} =\frac{2}{10} \\ \\ \frac{1}{5} =\frac{1*4}{5*4} =\frac{4}{20} \\ \\\frac{1}{5} =\frac{1*8}{5*8} =\frac{8}{40} \\ \\ \frac{1}{5} =\frac{1*20}{5*20} =\frac{20}{100}$