Percentage Decrease Calculator

About

This Percentage Decrease Calculator is designed to help you easily understand how much a value has dropped—whether you’re comparing two values to see the percentage decrease, or starting with a single value and applying a percentage reduction to find the new result. Unlike many other percentage calculators, this calculator works instantly as you type, updating the results automatically without any need to press a button. It was created to be clean, modern, and intuitive, with a layout that’s fully optimized for mobile devices. Whether you’re analyzing changes in data, checking price drops, or doing quick business calculations, this tool is built to make your experience seamless and accurate—as designed from the ground up with user experience in mind.

How to use the Percentage Decrease Calculator

1. Enter Your Values: 

   • For two values: Enter the original value and the new value to calculate the percentage decrease between the two values.

   • For a percentage decrease: Enter the original value and the percentage to compute the new value after applying the percentage decrease.

2. Review the Results: As soon as you enter the values, the calculator will automatically display the results, showing the percentage decrease, as well as the absolute difference between the original and new values. Or decreased value with absolute difference.

The calculator uses the following percentage decrease formula:

Percentage Decrease = (Original Value – Original Value) / New Value​) × 100

Where:

• Original Value is the initial value before the decrease.

• New Value is the value after the decrease.

Explanation:

• First, subtract the new value from the original value to find the absolute decrease.

• Then, divide that difference by the original value to get the fractional decrease.

• Finally, multiply by 100 to convert the fraction into a percentage.

Following are some examples to show how to calculate percent decrease.

Scenario 1: Comparing Two Values

Imagine you’re looking at the price of a product that was originally priced at $150, but after a sale, the new price is $120. You want to know the percentage decrease in the price.

1. Enter the Original and New Value:

   • Original Price: $150

   • New Price: $120

2. Automatic Calculation:
   The calculator will immediately display:

   • Percentage Decrease:

     (150−120) / 150 × 100 = 20%,  So, the price has decreased by 20%.

   • Absolute Difference:

     150 −120 = 30

     So, the absolute difference is $30.

Scenario 2: Calculating the New Value After a Percentage Decrease

Now, suppose you have a salary of $2,000, and your employer tells you that there will be a 10% decrease. You want to know what your new salary will be.

1. Enter the Original Value and the Percentage Decrease:

   • Original Salary: $2,000

   • Percentage Decrease: 10%

2. Automatic Calculation:
   The calculator will immediately display:

   • New Value:

     2000 × (1−10/100) = 2000 × 0.90 = 1800

     So, your new salary will be $1,800.

   • Absolute Difference:

     2000 −1800 = 200

     So, the absolute decrease in your salary is $200.

This percent decrease calculator simplifies complex calculations, making it easy to get accurate results on the go.