$$\frac { 1 } { 8 } + \frac { 1 } { 3 } + \frac { 1 } { 4 } + \frac { 2 } { 3 }$$
$\frac{11}{8}=1.375$
$$\frac{3}{24}+\frac{8}{24}+\frac{1}{4}+\frac{2}{3}$$
$$\frac{3+8}{24}+\frac{1}{4}+\frac{2}{3}$$
$$\frac{11}{24}+\frac{1}{4}+\frac{2}{3}$$
$$\frac{11}{24}+\frac{6}{24}+\frac{2}{3}$$
$$\frac{11+6}{24}+\frac{2}{3}$$
$$\frac{17}{24}+\frac{2}{3}$$
$$\frac{17}{24}+\frac{16}{24}$$
$$\frac{17+16}{24}$$
$$\frac{33}{24}$$
$$\frac{11}{8}$$
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$\frac{11}{2 ^ {3}} = 1\frac{3}{8} = 1.375$