Given:
Last month sales = $900
Rate of commission = 20%
To find:
How much commission (in dollars) did she earn last month?
Solution:
We have, 20% rate of commission. So, the commission for the last month is equal to 20% of last month sales $900.
![\text{Commission}=(20)/(100)* 900](https://img.qammunity.org/2022/formulas/mathematics/high-school/x1186yqgxdnyva4dax5x0hsngkzrz3ulsi.png)
![\text{Commission}=20* 9](https://img.qammunity.org/2022/formulas/mathematics/high-school/uqeunnoatm0pmhwnuil3yg290cld9az50e.png)
![\text{Commission}=180](https://img.qammunity.org/2022/formulas/mathematics/high-school/p1d893fbklgbsrkc6hl4im91wj3n2olx4h.png)
Therefore, the commission for the last month is $180.