$$( \frac { 28 } { - 30 } \times \frac { 6 } { 7 } ) \div ( \frac { 12 } { 15 } \times \frac { 3 } { 4 } )$$
$-\frac{4}{3}\approx -1.333333333$
$$\frac{-\frac{14}{15}\times \frac{6}{7}}{\frac{12}{15}\times \frac{3}{4}}$$
$$\frac{\frac{-14\times 6}{15\times 7}}{\frac{12}{15}\times \frac{3}{4}}$$
$$\frac{\frac{-84}{105}}{\frac{12}{15}\times \frac{3}{4}}$$
$$\frac{-\frac{4}{5}}{\frac{12}{15}\times \frac{3}{4}}$$
$$\frac{-\frac{4}{5}}{\frac{4}{5}\times \frac{3}{4}}$$
$$\frac{-\frac{4}{5}}{\frac{4\times 3}{5\times 4}}$$
$$\frac{-\frac{4}{5}}{\frac{3}{5}}$$
$$-\frac{4}{5}\times \frac{5}{3}$$
$$\frac{-4\times 5}{5\times 3}$$
$$\frac{-4}{3}$$
$$-\frac{4}{3}$$
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$-\frac{4}{3} = -1\frac{1}{3} = -1.3333333333333333$
