$$\frac{2}{15}+\frac{7}{20}+\frac{3}{25}$$
$\frac{181}{300}\approx 0.603333333$
$$\frac{8}{60}+\frac{21}{60}+\frac{3}{25}$$
$$\frac{8+21}{60}+\frac{3}{25}$$
$$\frac{29}{60}+\frac{3}{25}$$
$$\frac{145}{300}+\frac{36}{300}$$
$$\frac{145+36}{300}$$
$$\frac{181}{300}$$
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$\frac{181}{2 ^ {2} \cdot 3 \cdot 5 ^ {2}} = 0.6033333333333334$
