Enter the total percentage decrease (%) and the total time into the Calculator. The calculator will evaluate the Percent Decrease Over Time. 

Percent Decrease Over Time Formula

PDT = PD / T


  • PDT is the Percent Decrease Over Time (%/unit time)
  • PD is the total percentage decrease (%)
  • T is the total time

To calculate the Percent Decrease Over Time, divide the total percentage decrease by the total time.

How to Calculate Percent Decrease Over Time?

The following steps outline how to calculate the Percent Decrease Over Time.

  1. First, determine the total percentage decrease (%). 
  2. Next, determine the total time. 
  3. Next, gather the formula from above = PDT = PD / T.
  4. Finally, calculate the Percent Decrease Over Time.
  5. After inserting the variables and calculating the result, check your answer with the calculator above.

Example Problem : 

Use the following variables as an example problem to test your knowledge.

total percentage decrease (%) = 16

total time = 8