The formula to calculate the Home Plate Ratio (HPR) is:
\[ HPR = \frac{HPA}{TPA} \]
Where:
Let's say the number of home plate appearances (HPA) is 150 and the total number of plate appearances (TPA) is 600. Using the formula:
\[ HPR = \frac{150}{600} \]
We get:
\[ HPR = 0.25 \]
So, the home plate ratio is 0.25.