$$\frac{2}{5}+\frac{4}{5}+\frac{1}{4}$$
$\frac{29}{20}=1.45$
$$\frac{2+4}{5}+\frac{1}{4}$$
$$\frac{6}{5}+\frac{1}{4}$$
$$\frac{24}{20}+\frac{5}{20}$$
$$\frac{24+5}{20}$$
$$\frac{29}{20}$$
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$\frac{29}{2 ^ {2} \cdot 5} = 1\frac{9}{20} = 1.45$