Percentage Change Calculator: Percent Increase & Decrease

Percentage Change Calculator

Use this free percentage change calculator to calculate the percentage change between two values. The calculator will return the percentage increase or decrease from one number to another number.

Free Percentage Change Calculator

Initial Value

Final Value

How to Use the Percentage Change Calculator

  • Step 1: Fill in the initial value and final value in the provided boxes.
  • Step 2: Click the “Calculate” button.
  • Step 3: You'll see the calculated percentage change expressed as an increase or decrease below the input form.

Percentage Change Formula

Percentage change equals the change in value from subtracting V1 from V2, divided by the absolute value of V1, multiplied by 100.

Percentage Change = (V2−V1) ÷ V1 x 100

How to Calculate Percentage Increase

  1. Subtract the original number (V1) from the new number (V2) to get the difference.
  2. Divide the difference by the original number (V1).
  3. Multiply the answer by 100.
  4. The percentage increase is the result.

How to Calculate Percentage Decrease

  1. Subtract the original number (V1) from the new number (V2) to get the difference expressed as a negative number with a minus (-) sign before it.
  2. Divide the difference by the original number (V1).
  3. Multiply the answer by 100.
  4. The percentage decrease is the result.

Percentage Change Examples

  • If the price of a product increases from $20 to $25, the percentage change is [(25-20)/20] x 100 = 25% increase.
  • If the population of a city decreases from 500,000 to 450,000, the percentage change is [(450,000-500,000)/500,000] x 100 = -10% decrease.
  • If the area of a rectangle changes from 24 cm2 to 18 cm2, the percentage change is [(18-24)/24] x 100 = -25% decrease.
  • If the speed of a car changes from 60 km/h to 72 km/h, the percentage change is [(72-60)/60] x 100 = 20% increase.
  • If the weight of a person changes from 70 kg to 63 kg, the percentage change is [(63-70)/70] x 100 = -10% decrease.

Enjoy The Percentage Change Calculator

We encourage you to bookmark this free percentage change calculator so you can save the link in your browser. That way you can use the tool online any time you need. Also, share this online calculator page with others so they can easily find the percentage increase and decrease for a set of numbers.