14/5 to improper fraction
\(\frac{14}{5}=\frac{10}{5}+\frac{4}{5}=2+\frac{4}{5}\color{blue}=2\frac{4}{5}\)
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Wait a second! \(\frac{14}{5}\) is an improper fraction already, so there is no need to change it.
\(2\frac{4}{5}\) is a mixed fraction.
My guess is that the guest misspoke.