write $\frac{4}{5}$ as a decimal number.

Answer:

$0.8$

Explanation:

Step1: Recall fraction - decimal conversion

A fraction $\frac{a}{b}$ can be written as $a\div b$. So, $\frac{4}{5}=4\div5$.

Step2: Perform the division

$4\div5 = 0.8$.