$$2\frac{1}{5}-5$$
$-\frac{14}{5}=-2.8$
$$\frac{10+1}{5}-5$$
$$\frac{11}{5}-5$$
$$\frac{11}{5}-\frac{25}{5}$$
$$\frac{11-25}{5}$$
$$-\frac{14}{5}$$
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$-\frac{14}{5} = -2\frac{4}{5} = -2.8$