Hello! To solve this exercise, we have to use the rule of three, look:
Let's consider:
• $2800 is the full value, so, 100%
,• $532 is the commission, as x %
[tex]\begin{gathered} \frac{2800}{532}=\frac{100}{x} \\ \\ \text{multiplying accross} \\ 2800\cdot x=532\cdot100 \\ 2800x=53200 \\ \\ x=\frac{53200}{2800} \\ \\ x=19 \end{gathered}[/tex]So, the commission rate is 19%.