Answer :
hello
the question given request we calculate the amount earned via commission sales weekly
she made a sale of $640 of jewelry in a particular week.
we need to find 5% of 640 to know how much she earned that week
5% of 640
[tex]\begin{gathered} 5\text{ \% of 640} \\ \frac{5}{100}=\frac{x}{640} \\ \text{cross multiply both sides and solev for x} \\ 100\times x=5\times640 \\ 100x=3200 \\ \text{divide both sides by 100} \\ \frac{100x}{100}=\frac{3200}{100} \\ x=32 \end{gathered}[/tex]from the calculation above, Hindi earned $32 that week on commission