The formula to calculate the Food Profit Margin (FPM) is:
\[ FPM = \left( \frac{FSP - FC}{FSP} \right) \times 100 \]
Where:
Let's say the food sell price (FSP) is $20 and the food cost (FC) is $8. Using the formula:
\[ FPM = \left( \frac{20 - 8}{20} \right) \times 100 \]
We get:
\[ FPM = \left( \frac{12}{20} \right) \times 100 = 60\% \]
So, the food profit margin is 60%.