One way to solve the exercise is to use the rule of three, like this
[tex]\begin{gathered} 8\text{ chairs}\rightarrow1\text{ table} \\ 16\text{ chairs}\rightarrow x\text{ tables} \end{gathered}[/tex][tex]\begin{gathered} x=\frac{16\text{ chairs }\cdot\text{ 1 table}}{8\text{ chairs}} \\ x=\frac{16}{8}\text{ tables} \\ x=2\text{ tables} \end{gathered}[/tex]Therefore, the missing number to complete the proportion is 2.
