Final answer:
A saleswoman who earns a 40% commission on her sales sold $300 worth of merchandise. By calculating 40% of $300, it is found that she earned a commission of $120 last month.
Step-by-step explanation:
The question at hand is a basic percentages problem generally taught in middle school mathematics. The student is asked to calculate how much commission a saleswoman makes from her sales if she sold $300 worth of merchandise and earns a 40% commission.
To find out the commission, we need to calculate 40% of $300. The formula to calculate the percentage of a number is:
Commission = Sale Amount x (Percent Commission / 100)
Applying this:
Commission = $300 x (40 / 100)
Commission = $300 x 0.4
Commission = $120
Therefore, the saleswoman earned a commission of $120 last month.