EXPLANATION
Let's see the facts:
Gross receipts = $12,000
Profit = $8,000
The percentage can be obtained by applying the following relationship:
[tex]\text{Profit\%}=\frac{profit}{\text{gross receipts}}\cdot100=\frac{8,000}{12,000}\cdot100=66.7\text{ \%}[/tex]The answer is 66.7%