$$\frac{ 7 }{ 14 } + \frac{ 6 }{ 8 } + \frac{ 4 }{ 12 } + \frac{ 3 }{ 15 } =$$
$\frac{107}{60}\approx 1.783333333$
$$\frac{1}{2}+\frac{6}{8}+\frac{4}{12}+\frac{3}{15}$$
$$\frac{1}{2}+\frac{3}{4}+\frac{4}{12}+\frac{3}{15}$$
$$\frac{2}{4}+\frac{3}{4}+\frac{4}{12}+\frac{3}{15}$$
$$\frac{2+3}{4}+\frac{4}{12}+\frac{3}{15}$$
$$\frac{5}{4}+\frac{4}{12}+\frac{3}{15}$$
$$\frac{5}{4}+\frac{1}{3}+\frac{3}{15}$$
$$\frac{15}{12}+\frac{4}{12}+\frac{3}{15}$$
$$\frac{15+4}{12}+\frac{3}{15}$$
$$\frac{19}{12}+\frac{3}{15}$$
$$\frac{19}{12}+\frac{1}{5}$$
$$\frac{95}{60}+\frac{12}{60}$$
$$\frac{95+12}{60}$$
$$\frac{107}{60}$$
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$\frac{107}{2 ^ {2} \cdot 3 \cdot 5} = 1\frac{47}{60} = 1.7833333333333334$
