7. A salesperson at an electronics store received a commission of $\$ 180$ for the day. If the salesperson sold $\$ 1,650$ worth of merchandise, what percent of commission is the salesperson paid? Round the answer to the nearest tenth of a percent.
$7.9 \%$
$0.9 \%$
$10.9 \%$
$9.1 \%$

Step 1 ：Given that the salesperson received a commission of $180 for selling $1650 worth of merchandise.

Step 2 ：We can calculate the commission rate by dividing the commission by the total sales and then multiplying by 100 to convert it to a percentage.

Step 3 ：Let's denote the commission as \(c\), and the total sales as \(s\). The commission rate \(r\) can be calculated as follows: \(r = \frac{c}{s} \times 100\)

Step 4 ：Substitute \(c = 180\) and \(s = 1650\) into the equation, we get \(r = \frac{180}{1650} \times 100\)

Step 5 ：Calculate the above expression to get the commission rate \(r = 10.909090909090908\)

Step 6 ：Round the commission rate to the nearest tenth of a percent to get \(r = 10.9\)

Step 7 ：Final Answer: The salesperson is paid a commission rate of \(\boxed{10.9\%}\)