Use this rule: \(\frac{a}{b} \times \frac{c}{d}=\frac{ac}{bd}\).
\[\frac{1\times 7\times 7\times 1}{{7}^{v}\times 28}\]
Simplify \(1\times 7\) to \(7\).
\[\frac{7\times 7\times 1}{{7}^{v}\times 28}\]
Simplify \(7\times 7\) to \(49\).
\[\frac{49\times 1}{{7}^{v}\times 28}\]
Simplify \(49\times 1\) to \(49\).
\[\frac{49}{{7}^{v}\times 28}\]
Regroup terms.
\[\frac{49}{28\times {7}^{v}}\]
Simplify.
\[\frac{7}{4\times {7}^{v}}\]
7/(4*7^v)
