$$\frac{ 15 }{ 11 } \div \frac{ 20 }{ 33 }$$
$\frac{9}{4}=2.25$
$$\frac{15}{11}\times \frac{33}{20}$$
$$\frac{15\times 33}{11\times 20}$$
$$\frac{495}{220}$$
$$\frac{9}{4}$$
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$\frac{3 ^ {2}}{2 ^ {2}} = 2\frac{1}{4} = 2.25$
