$$4 \frac { 2 } { 3 } - 3 \frac { 3 } { 4 } - 2 \frac { 1 } { 6 }$$
$-\frac{5}{4}=-1.25$
$$\frac{12+2}{3}-\frac{3\times 4+3}{4}-\frac{2\times 6+1}{6}$$
$$\frac{14}{3}-\frac{3\times 4+3}{4}-\frac{2\times 6+1}{6}$$
$$\frac{14}{3}-\frac{12+3}{4}-\frac{2\times 6+1}{6}$$
$$\frac{14}{3}-\frac{15}{4}-\frac{2\times 6+1}{6}$$
$$\frac{56}{12}-\frac{45}{12}-\frac{2\times 6+1}{6}$$
$$\frac{56-45}{12}-\frac{2\times 6+1}{6}$$
$$\frac{11}{12}-\frac{2\times 6+1}{6}$$
$$\frac{11}{12}-\frac{12+1}{6}$$
$$\frac{11}{12}-\frac{13}{6}$$
$$\frac{11}{12}-\frac{26}{12}$$
$$\frac{11-26}{12}$$
$$\frac{-15}{12}$$
$$-\frac{5}{4}$$
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$-\frac{5}{4} = -1\frac{1}{4} = -1.25$
