Calculation:
Let us convert these into decimals and percent.
For converting into a percent we multiply by 100 and then put per cent sign %
\(\displaystyle{\frac{{{4}}}{{{5}}}}={\frac{{{4}}}{{{5}}}}{\left({100}\right)}\%\)

\(\displaystyle={4}{\left({20}\right)}\%\)

\(\displaystyle={80}\%\) For decimal just divide percent by 100, i.e. shift the decimal point two digits to the left. \(\displaystyle{80}\%={\frac{{{80}}}{{{100}}}}\)

\(\displaystyle={0.80}\)

\(\displaystyle={4}{\left({20}\right)}\%\)

\(\displaystyle={80}\%\) For decimal just divide percent by 100, i.e. shift the decimal point two digits to the left. \(\displaystyle{80}\%={\frac{{{80}}}{{{100}}}}\)

\(\displaystyle={0.80}\)