$$\frac{-2}{5}\times\frac{3}{7}-\frac{4}{5}\times\frac{1}{8}+\frac{5}{1}\times\frac{-2}{5}$$
$-\frac{159}{70}\approx -2.271428571$
$$-\frac{2}{5}\times \frac{3}{7}-\frac{4}{5}\times \frac{1}{8}+\frac{5}{1}\times \frac{-2}{5}$$
$$\frac{-2\times 3}{5\times 7}-\frac{4}{5}\times \frac{1}{8}+\frac{5}{1}\times \frac{-2}{5}$$
$$\frac{-6}{35}-\frac{4}{5}\times \frac{1}{8}+\frac{5}{1}\times \frac{-2}{5}$$
$$-\frac{6}{35}-\frac{4}{5}\times \frac{1}{8}+\frac{5}{1}\times \frac{-2}{5}$$
$$-\frac{6}{35}-\frac{4\times 1}{5\times 8}+\frac{5}{1}\times \frac{-2}{5}$$
$$-\frac{6}{35}-\frac{4}{40}+\frac{5}{1}\times \frac{-2}{5}$$
$$-\frac{6}{35}-\frac{1}{10}+\frac{5}{1}\times \frac{-2}{5}$$
$$-\frac{12}{70}-\frac{7}{70}+\frac{5}{1}\times \frac{-2}{5}$$
$$\frac{-12-7}{70}+\frac{5}{1}\times \frac{-2}{5}$$
$$-\frac{19}{70}+\frac{5}{1}\times \frac{-2}{5}$$
$$-\frac{19}{70}+5\times \frac{-2}{5}$$
$$-\frac{19}{70}+5\left(-\frac{2}{5}\right)$$
$$-\frac{19}{70}-2$$
$$-\frac{19}{70}-\frac{140}{70}$$
$$\frac{-19-140}{70}$$
$$-\frac{159}{70}$$
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$-\frac{159}{70} = -2\frac{19}{70} = -2.2714285714285714$