The formula to calculate the Chemical to Water Ratio (R) is:
\[ R = \frac{C}{W} \]
Where:
Let's say the amount of chemical (C) is 10 liters and the amount of water (W) is 100 liters. Using the formula:
\[ R = \frac{10}{100} \]
We get:
\[ R = 0.1 \]
So, the chemical to water ratio is 0.1.