The following formula is used to calculate the percentage difference between the two values:
\[ PD = \frac{|X - Y|}{\frac{(X + Y)}{2}} \times 100 \]
PD is the percentage difference (%)
X is one of the values
Y is the other numerical value
Let's assume the values are:
Percentage Difference (PD) = |50 - 30| / [(50 + 30) / 2] × 100
PD = 20 / 40 × 100 = 50%