Здравствуйте, помогите решить домашнее задание.

$\frac{1}{9} = \frac{1 * 19}{9 * 19} = \frac{19}{171}$

$\frac{1}{19} = \frac{1 * 9}{19 * 9} = \frac{9}{171}$

$\frac{19}{171}$ > $\frac{9}{171}$

$\frac{1}{9}$ > $\frac{1}{19}$

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$\frac{1}{2} = \frac{1*10}{2*10} = \frac{10}{20}$

$\frac{10}{20}$ < <img src="https://tex.z-dn.net/?f=+%5Cfrac%7B17%7D%7B20%7D+" id="TexFormula9" title=" \frac{17}{20} " alt=" \frac{17}{20} " align="absmiddle" class="latex-formula">

$\frac{1}{2}$ < </span> $\frac{17}{20}$