$$2/5-3/4 \times 10 \times 1/4$$
$-\frac{59}{40}=-1.475$
$$\frac{2}{5}-\frac{\frac{3\times 10}{4}\times 1}{4}$$
$$\frac{2}{5}-\frac{\frac{30}{4}\times 1}{4}$$
$$\frac{2}{5}-\frac{\frac{15}{2}\times 1}{4}$$
$$\frac{2}{5}-\frac{\frac{15}{2}}{4}$$
$$\frac{2}{5}-\frac{15}{2\times 4}$$
$$\frac{2}{5}-\frac{15}{8}$$
$$\frac{16}{40}-\frac{75}{40}$$
$$\frac{16-75}{40}$$
$$-\frac{59}{40}$$
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$-\frac{59}{40} = -1\frac{19}{40} = -1.475$
