$$( \frac { 3 } { 4 } \cdot \frac { 2 } { 9 } + \frac { 5 } { 8 } ) \cdot \frac { 2 } { 5 }$$
$\frac{19}{60}\approx 0.316666667$
$$\left(\frac{3\times 2}{4\times 9}+\frac{5}{8}\right)\times \frac{2}{5}$$
$$\left(\frac{6}{36}+\frac{5}{8}\right)\times \frac{2}{5}$$
$$\left(\frac{1}{6}+\frac{5}{8}\right)\times \frac{2}{5}$$
$$\left(\frac{4}{24}+\frac{15}{24}\right)\times \frac{2}{5}$$
$$\frac{4+15}{24}\times \frac{2}{5}$$
$$\frac{19}{24}\times \frac{2}{5}$$
$$\frac{19\times 2}{24\times 5}$$
$$\frac{38}{120}$$
$$\frac{19}{60}$$
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$\frac{19}{2 ^ {2} \cdot 3 \cdot 5} = 0.31666666666666665$
