The commission rate is approximately 13%, calculated by dividing the commission of $890.5 by the total sales of $6850 and multiplying by 100.
To find the commission rate, divide the earned commission by the total sales amount and multiply by 100 to express it as a percentage. In this case, the commission rate R can be calculated as follows:
![\[ R = \left( \frac{\text{Commission}}{\text{Total Sales}} \right) * 100 \]](https://img.qammunity.org/2024/formulas/mathematics/high-school/yy6qlb63ee24ccjulctibs08nltk7xlrw3.png)
Substitute the given values:
![\[ R = \left( (890.5)/(6850) \right) * 100 \]](https://img.qammunity.org/2024/formulas/mathematics/high-school/qz2px0frmmxdadsrah3bj0jorefqxu7fpe.png)
Perform the calculation:
![\[ R \approx \left( (0.1299)/(1) \right) * 100 \approx 13\% \]](https://img.qammunity.org/2024/formulas/mathematics/high-school/7zf3tat5epgs48o1kzcj5i16f23bgxs2o4.png)
Therefore, the commission rate is approximately 13%. This implies that the salesperson earned a commission equivalent to 13% of the total sales amount of $6850.