Percent Increase Decrease

April 24, 2025 3 min read

Understanding how to calculate percent increase decrease is a crucial skill in various aspects of life, from managing personal finances to analyzing business performance. Whether you're tracking changes in investment values, sales figures, or even your own weight, knowing how to determine the percent change helps you make informed decisions. Luckily, our online calculator makes this process quick and easy!

Simplify Percent Change Calculations Instantly

Quickly find percent increase decrease using our online tool for accurate results every time.

Calculate Percent Change Now →

What is Percent Increase and Percent Decrease?

Percent increase measures the relative change when a value goes up, while percent decrease measures the relative change when a value goes down. Both are expressed as a percentage of the original value.

How to Calculate Percent Increase and Decrease

The formulas for calculating percent increase and percent decrease are quite similar:

  • Percent Increase: [(New Value - Original Value) / Original Value] x 100
  • Percent Decrease: [(Original Value - New Value) / Original Value] x 100

Let's break this down with an example:

Suppose the price of your favorite coffee increased from $4.00 to $4.50. To find the percent increase:

  1. Calculate the difference: $4.50 - $4.00 = $0.50
  2. Divide by the original value: $0.50 / $4.00 = 0.125
  3. Multiply by 100: 0.125 x 100 = 12.5%

So, the price of coffee increased by 12.5%.

Real-World Applications

Understanding percent increase decrease is useful in many situations:

  • Finance: Calculating investment returns, tracking budget changes.
  • Retail: Determining discount percentages, analyzing sales growth or decline.
  • Health: Monitoring weight loss or gain, tracking changes in health metrics.
  • Business: Analyzing revenue growth, tracking expense reduction.

For example, a business might track its monthly sales. If sales increased from $10,000 in January to $12,000 in February, that's a 20% increase. If sales then decreased to $9,000 in March, that's a 25% decrease from February.

Using Our Percentage Calculator

While the formulas are straightforward, calculating percent increase decrease can be tedious, especially with complex numbers. Our online percentage calculator simplifies this process. Simply enter the original and new values, and the calculator will instantly display the percent increase or decrease.

Our calculator can also help with related calculations, such as figuring out what is the percentage of a number or calculating the percentage between two numbers.

Avoiding Common Mistakes

A common mistake is calculating the percentage change based on the wrong original value. Always use the initial value as the denominator in the formula. Also, be mindful of whether you are calculating an increase or a decrease; using the wrong formula will give you an incorrect result. Our calculator eliminates these errors.

Example

Let's say your electricity bill was $150 last month and $130 this month. What's the percent decrease?

With our calculator, simply input 150 as the original value and 130 as the new value. The result? A 13.33% decrease.

Conclusion

Mastering the calculation of percent increase decrease empowers you to understand and interpret changes in data effectively. Use our percentage calculator to simplify these calculations, saving time and ensuring accuracy.