$$\frac { 7 } { 11 } \times \frac { 5 } { 22 } + \frac { 9 } { 22 } \times \frac { - 5 } { 11 }$$
$-\frac{5}{121}\approx -0.041322314$
$$\frac{7\times 5}{11\times 22}+\frac{9}{22}\times \frac{-5}{11}$$
$$\frac{35}{242}+\frac{9}{22}\times \frac{-5}{11}$$
$$\frac{35}{242}+\frac{9}{22}\left(-\frac{5}{11}\right)$$
$$\frac{35}{242}+\frac{9\left(-5\right)}{22\times 11}$$
$$\frac{35}{242}+\frac{-45}{242}$$
$$\frac{35}{242}-\frac{45}{242}$$
$$\frac{35-45}{242}$$
$$\frac{-10}{242}$$
$$-\frac{5}{121}$$
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$-\frac{5}{121} = -0.04132231404958678$
