Percentage Change Calculator

About

This Percentage Change Calculator is designed to help users quickly and accurately determine the percentage increase or decrease between two values. Unlike many other percentage calculators, this calculator offers an elegant, modern interface optimized for both desktop and mobile devices, making it fast and effortless to use anywhere. Whether you’re comparing prices, analyzing financial data, or simply tracking value changes over time, this tool simplifies the math with automatic calculations and real-time results.

It was created to improve user experience by combining beauty and functionality. With just a few inputs, the calculator tells you whether the change is an increase or a decrease, displays the percentage change, shows the absolute difference, and even includes a step-by-step breakdown of the calculation. It’s perfect for students, professionals, shoppers, and anyone who needs to make sense of changing numbers in everyday life.

What is Percentage Change?

Percentage change measures the relative difference between an old and new value, expressed as a percentage. It is calculated by dividing the difference (new minus old) by the absolute value of the old value, then multiplying by 100. A positive result denotes an increase; a negative result indicates a decrease.

The formula is:

Percentage change = (New value − Original value) ÷ Original value × 100

Percentage change in real life.

Example 1:

Imagine a retail store that made $50,000 in sales in January. In February, the sales increased to $60,000. To find the percentage change in sales:

• Subtract the January sales from the February sales:
  $60,000 – $50,000 = $10,000

• Divide that difference by the January sales:
  $10,000 ÷ $50,000 = 0.2

• Multiply by 100 to get the percentage:
  0.2 × 100 = 20%

Conclusion: The store’s sales increased by 20%.

Example 2:

Let’s say an employee’s salary increased from $45,000 to $50,000. To find the percentage change:

• Subtract the original salary from the new salary:
  $50,000 – $45,000 = $5,000

• Divide that difference by the original salary:
  $5,000 ÷ $45,000 = 0.1111

• Multiply by 100 to get the percentage:
  0.1111 × 100 = 11.11%

Conclusion: The employee’s salary increased by 11.11%.

Example 3:

Suppose a product’s price was originally $200, but during a sale, the price dropped to $150. To find the percentage change:

• Subtract the new price from the original price:
  $200 – $150 = $50

• Divide that difference by the original price:
  $50 ÷ $200 = 0.25

• Multiply by 100 to get the percentage:
  0.25 × 100 = 25%

Since it’s a decrease, the percentage change is -25%.

Conclusion: The product’s price decreased by 25%.

In these examples, the percentage change helps measure the increase or decrease in different contexts, like sales, stock prices, salaries, and more. The process is consistent—just find the difference between the new and old values, divide by the original value, and multiply by 100 to get the percentage change.

Or you use our percentage change calculator to do the math, which is simple and quick. Here’s a step-by-step guide to help you understand how to use one: