If we divide an 8 by 10 for example, the answer is 0.8, So, when you divide a number by 10, you should move 1 place the decimal point to the left direction.
For example:
[tex]\begin{gathered} \frac{0.5}{10}=0.005 \\ \frac{78.0}{10}=7.8 \\ \frac{34.5}{10}=3.45 \end{gathered}[/tex]