The formula to calculate the Fluid Ratio (FR) is:
\[ FR = \frac{F}{TM} \times 100 \]
Where:
Let's say the total fluid mass (F) is 50 grams and the total substance mass (TM) is 200 grams. Using the formula:
\[ FR = \frac{50}{200} \times 100 = 25 \]
So, the Fluid Ratio (FR) is 25%.