1.
80% means eighty out of every hundred.
This way, the fraction would be:
[tex]\frac{80}{100}[/tex]Simplifying,
[tex]\frac{80}{100}\rightarrow\frac{8}{10}\rightarrow\frac{4}{5}[/tex]Note: Notice that eighty out of every hundred, eight out of every ten and four out of every five mean all the same: 80%
2.
3/8 means three out of every eight. To convert this to a percentage we can use a rule of three, taking 8 as the 100% as following:
This way,
[tex]\begin{gathered} x=\frac{3\cdot100}{8} \\ \rightarrow x=37.5 \end{gathered}[/tex]Therefore, 3/8 as a percentage would be 37.5%
