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$\frac{15}{90} + \frac{12}{90} < \frac{1}{90} + \frac{40}{90}$

\frac{61}{120} + \frac{21}{120} " alt=" \frac{77}{120} + \frac{42}{120} > \frac{61}{120} + \frac{21}{120} " align="absmiddle" class="latex-formula">

$\frac{2}{12} - \frac{1}{12} < \frac{5}{12} - \frac{2}{12}$

\frac{5}{30} + \frac{2}{30} " alt=" \frac{5}{30} + \frac{3}{30} > \frac{5}{30} + \frac{2}{30} " align="absmiddle" class="latex-formula">

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