$${\frac{{\mathtt{4}}}{{\mathtt{5}}}} = {\mathtt{0.8}}$$
It can be many answers.
$${\frac{{\mathtt{4}}}{{\mathtt{5}}}} = {\frac{{\mathtt{8}}}{{\mathtt{10}}}}$$, $${\frac{{\mathtt{4}}}{{\mathtt{5}}}} = {\frac{{\mathtt{12}}}{{\mathtt{15}}}}$$, $${\frac{{\mathtt{4}}}{{\mathtt{5}}}} = {\frac{{\mathtt{16}}}{{\mathtt{20}}}}$$, $$\mbox{etc.}$$
Yes. There are many answers.
