Invert and multiply.
\[\begin{aligned}&\frac{11}{2}\times \frac{4}{11}-\frac{21}{2}\times \frac{1}{4}\\&\frac{1}{3}\times \frac{1}{2}+\frac{1}{6}\times \frac{1}{2}\end{aligned}\]
Cancel \(11\).
\[\begin{aligned}&\frac{1}{2}\times 4-\frac{21}{2}\times \frac{1}{4}\\&\frac{1}{3}\times \frac{1}{2}+\frac{1}{6}\times \frac{1}{2}\end{aligned}\]
Simplify \(\frac{1}{2}\times 4\) to \(\frac{4}{2}\).
\[\begin{aligned}&\frac{4}{2}-\frac{21}{2}\times \frac{1}{4}\\&\frac{1}{3}\times \frac{1}{2}+\frac{1}{6}\times \frac{1}{2}\end{aligned}\]
Simplify \(\frac{4}{2}\) to \(2\).
\[\begin{aligned}&2-\frac{21}{2}\times \frac{1}{4}\\&\frac{1}{3}\times \frac{1}{2}+\frac{1}{6}\times \frac{1}{2}\end{aligned}\]
Use this rule: \(\frac{a}{b} \times \frac{c}{d}=\frac{ac}{bd}\).
\[\begin{aligned}&2-\frac{21}{2}\times \frac{1}{4}\\&\frac{1}{3}\times \frac{1}{2}+\frac{1\times 1}{6\times 2}\end{aligned}\]
Simplify \(1\times 1\) to \(1\).
\[\begin{aligned}&2-\frac{21}{2}\times \frac{1}{4}\\&\frac{1}{3}\times \frac{1}{2}+\frac{1}{6\times 2}\end{aligned}\]
Simplify \(6\times 2\) to \(12\).
\[\begin{aligned}&2-\frac{21}{2}\times \frac{1}{4}\\&\frac{1}{3}\times \frac{1}{2}+\frac{1}{12}\end{aligned}\]
2-21/2*1/4;1/3*1/2+1/12
