Average product of a factor is the total output produced per unit of the factor employed thus,

Average product = total product / number of units of factor employed

If Q stands for total product L for the number of a variable factor employed then a average product (AP) is given by:

Ap Q/L

We can measures the average product from the total product data given in table 16.1 thus when two units of labour are employed the average product is Q/K = 170 / 2 = 85 similarly when three units of labour are employed average product is 270/3 = 90 so on.