Enter the final rate and the percentage change (%) into the Initial Rate Calculator. The calculator will evaluate the Initial Rate. 

Initial Rate Formula

The following two example problems outline the steps and information needed to calculate the Initial Rate.

IR = FR / (1+C/100)

  • Where IR is the Initial Rate
  • FR is the final rate 
  • C is the percentage change (%) 

How to Calculate Initial Rate?

The following example problems outline how to calculate Initial Rate.

Example Problem #1:

  1. First, determine the final rate. 
    • The final rate is given as: 500.
  2. Next, determine the percentage change (%). 
    • The percentage change (%) is provided as: 30.
  3. Finally, calculate the Initial Rate using the equation above: 

IR = FR / (1+C/100)

The values provided above are inserted into the equation below and computed.

IR = 500 / (1+30/100) = 384.61


Example Problem #2: 

For this problem, the variables required are provided below:

final rate = 600

percentage change (%) = 50

Test your knowledge using the equation and check your answer with the calculator..

IR = FR / (1+C/100) = ?