$$( \frac { 3 } { 11 } \times \frac { 5 } { 6 } ) - ( \frac { 9 } { 22 } \div \frac { 3 } { 4 } )$$
$-\frac{7}{22}\approx -0.318181818$
$$\frac{3\times 5}{11\times 6}-\frac{\frac{9}{22}}{\frac{3}{4}}$$
$$\frac{15}{66}-\frac{\frac{9}{22}}{\frac{3}{4}}$$
$$\frac{5}{22}-\frac{\frac{9}{22}}{\frac{3}{4}}$$
$$\frac{5}{22}-\frac{9}{22}\times \frac{4}{3}$$
$$\frac{5}{22}-\frac{9\times 4}{22\times 3}$$
$$\frac{5}{22}-\frac{36}{66}$$
$$\frac{5}{22}-\frac{6}{11}$$
$$\frac{5}{22}-\frac{12}{22}$$
$$\frac{5-12}{22}$$
$$-\frac{7}{22}$$
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$-\frac{7}{22} = -0.3181818181818182$
