$$\frac{2}{5}\cdot(\frac{15}{8}+\frac{3}{4}+\frac{1}{2})$$
$\frac{5}{4}=1.25$
$$\frac{2}{5}\left(\frac{15}{8}+\frac{6}{8}+\frac{1}{2}\right)$$
$$\frac{2}{5}\left(\frac{15+6}{8}+\frac{1}{2}\right)$$
$$\frac{2}{5}\left(\frac{21}{8}+\frac{1}{2}\right)$$
$$\frac{2}{5}\left(\frac{21}{8}+\frac{4}{8}\right)$$
$$\frac{2}{5}\times \frac{21+4}{8}$$
$$\frac{2}{5}\times \frac{25}{8}$$
$$\frac{2\times 25}{5\times 8}$$
$$\frac{50}{40}$$
$$\frac{5}{4}$$
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$\frac{5}{2 ^ {2}} = 1\frac{1}{4} = 1.25$
