$$\frac{ 47 }{ 140 } + \frac{ 9 }{ 40 } + \frac{ 19 }{ 190 } + \frac{ 91 }{ 300 } =$$
$\frac{4049}{4200}\approx 0.964047619$
$$\frac{94}{280}+\frac{63}{280}+\frac{19}{190}+\frac{91}{300}$$
$$\frac{94+63}{280}+\frac{19}{190}+\frac{91}{300}$$
$$\frac{157}{280}+\frac{19}{190}+\frac{91}{300}$$
$$\frac{157}{280}+\frac{1}{10}+\frac{91}{300}$$
$$\frac{157}{280}+\frac{28}{280}+\frac{91}{300}$$
$$\frac{157+28}{280}+\frac{91}{300}$$
$$\frac{185}{280}+\frac{91}{300}$$
$$\frac{37}{56}+\frac{91}{300}$$
$$\frac{2775}{4200}+\frac{1274}{4200}$$
$$\frac{2775+1274}{4200}$$
$$\frac{4049}{4200}$$
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$\frac{4049}{2 ^ {3} \cdot 3 \cdot 5 ^ {2} \cdot 7} = 0.964047619047619$
