What is the formula to calculate average of percents?

The formula to calculate the average of percentage:

(Percentage 1 + Percentage 2 + ... + Percentage n) / n

Percentage 1, Percentage 2, ..., Percentage n are the individual percentages

n is the number of percentages

For example, if you have the following percentages:

30%

25%

15%

The average percentage would be calculated as follows:

(30% + 25% + 15%) / 3 = 25%