A salesperson earns a 6% commission on sales. If total sales for the month are $12,500, what is the commission earned?

The commission is $6\%$ of the sales: $12{,}500(0.06)=750$ dollars, choice B. A mental check is that $1\%$ of $12{,}500$ is $125$, and $6\cdot125=750$. Choice A ($75) moves the decimal one place too far, which is $0.6\%$. Choice C ($7,500) moves it the other way, which is $60\%$. Choice D ($2,083.33) is $\frac{12{,}500}{6}$, which divides by $6$ instead of taking $6$ percent. To find a percent of a number, convert the percent to a decimal and multiply.