$$( \frac { 1 } { 2 } \times \frac { 1 } { 4 } ) - ( 1 \times \frac { 1 } { 4 } ) + ( \frac { - 7 } { 18 } \div \frac { - 7 } { - 15 } )$$
$-\frac{23}{24}\approx -0.958333333$
$$\frac{1\times 1}{2\times 4}-1\times \frac{1}{4}+\frac{\frac{-7}{18}}{\frac{-7}{-15}}$$
$$\frac{1}{8}-1\times \frac{1}{4}+\frac{\frac{-7}{18}}{\frac{-7}{-15}}$$
$$\frac{1}{8}-\frac{1}{4}+\frac{\frac{-7}{18}}{\frac{-7}{-15}}$$
$$\frac{1}{8}-\frac{2}{8}+\frac{\frac{-7}{18}}{\frac{-7}{-15}}$$
$$\frac{1-2}{8}+\frac{\frac{-7}{18}}{\frac{-7}{-15}}$$
$$-\frac{1}{8}+\frac{\frac{-7}{18}}{\frac{-7}{-15}}$$
$$-\frac{1}{8}+\frac{-7\left(-15\right)}{18\left(-7\right)}$$
$$-\frac{1}{8}+\frac{-5}{6}$$
$$-\frac{1}{8}-\frac{5}{6}$$
$$-\frac{3}{24}-\frac{20}{24}$$
$$\frac{-3-20}{24}$$
$$-\frac{23}{24}$$
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$-\frac{23}{24} = -0.9583333333333334$
