$$(\frac{8}{15}+\frac{1}{10})+(\frac{3}{5}+\frac{3}{8})$$
$\frac{193}{120}\approx 1.608333333$
$$\frac{16}{30}+\frac{3}{30}+\frac{3}{5}+\frac{3}{8}$$
$$\frac{16+3}{30}+\frac{3}{5}+\frac{3}{8}$$
$$\frac{19}{30}+\frac{3}{5}+\frac{3}{8}$$
$$\frac{19}{30}+\frac{18}{30}+\frac{3}{8}$$
$$\frac{19+18}{30}+\frac{3}{8}$$
$$\frac{37}{30}+\frac{3}{8}$$
$$\frac{148}{120}+\frac{45}{120}$$
$$\frac{148+45}{120}$$
$$\frac{193}{120}$$
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$\frac{193}{2 ^ {3} \cdot 3 \cdot 5} = 1\frac{73}{120} = 1.6083333333333334$
