$$\frac{-7}{8}\times\frac{2}{3}-\frac{1}{4}\times\frac{3}{5}-\frac{4}{5}\times\frac{7}{8}$$
$-\frac{43}{30}\approx -1.433333333$
$$-\frac{7}{8}\times \frac{2}{3}-\frac{1}{4}\times \frac{3}{5}-\frac{4}{5}\times \frac{7}{8}$$
$$\frac{-7\times 2}{8\times 3}-\frac{1}{4}\times \frac{3}{5}-\frac{4}{5}\times \frac{7}{8}$$
$$\frac{-14}{24}-\frac{1}{4}\times \frac{3}{5}-\frac{4}{5}\times \frac{7}{8}$$
$$-\frac{7}{12}-\frac{1}{4}\times \frac{3}{5}-\frac{4}{5}\times \frac{7}{8}$$
$$-\frac{7}{12}-\frac{1\times 3}{4\times 5}-\frac{4}{5}\times \frac{7}{8}$$
$$-\frac{7}{12}-\frac{3}{20}-\frac{4}{5}\times \frac{7}{8}$$
$$-\frac{35}{60}-\frac{9}{60}-\frac{4}{5}\times \frac{7}{8}$$
$$\frac{-35-9}{60}-\frac{4}{5}\times \frac{7}{8}$$
$$\frac{-44}{60}-\frac{4}{5}\times \frac{7}{8}$$
$$-\frac{11}{15}-\frac{4}{5}\times \frac{7}{8}$$
$$-\frac{11}{15}-\frac{4\times 7}{5\times 8}$$
$$-\frac{11}{15}-\frac{28}{40}$$
$$-\frac{11}{15}-\frac{7}{10}$$
$$-\frac{22}{30}-\frac{21}{30}$$
$$\frac{-22-21}{30}$$
$$-\frac{43}{30}$$
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$-\frac{43}{30} = -1\frac{13}{30} = -1.4333333333333333$
