Marginal Product = Change in Total Output ÷ Change in Input
MP = ΔTP ÷ ΔL
Identify the input being changed, such as labor, capital, or land
Find the total output before the input change
Find the total output after the input change
Subtract the initial output from the new output
Subtract the initial input amount from the new input amount
Divide the change in output by the change in input
If one additional unit of input is added, Marginal Product = Change in Output from that one unit
Example: if output rises from 100 to 130 when labor rises from 5 to 6, MP = 30 ÷ 1 = 30
Marginal Product can be calculated for each additional unit of input separately