wha is equivalent to 4/5

$${\frac{{\mathtt{4}}}{{\mathtt{5}}}} = {\mathtt{0.8}}$$

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.

4/5 is equivalent to 8/10, 16/20...4/5 is the simplest fraction form.

4/5 in decimal form is 0.8.