Percentage Change Calculator

Quickly calculate the percentage change between two values with our user-friendly Percentage Change Calculator. Perfect for financial analysis and more.

Percentage Change Calculator

How to Use Percentage Change Calculator

Calculating percentage change can be a useful tool in a variety of applications, from finance to statistics. To use our Percentage Change Calculator, follow these simple steps:

  1. Navigate to the Percentage Change Calculator on our website.
  2. Enter the original value and the new value in the input fields.
  3. Click the “Calculate” button to instantly see the percentage change.

It’s as easy as that! Now let’s dive a bit deeper into the world of percentages and percentage change calculations.

Understanding Percentages and Percentage Change

A percentage is a way to express a proportion or ratio as a fraction of 100. It is often denoted by the symbol “%”. For example, if 20 out of 100 people in a room are wearing red shirts, we can say that 20% of the people are wearing red shirts.

Percentage change, on the other hand, is the difference between two values expressed as a percentage of the original value. It is often used to track changes over time, such as changes in stock prices or inflation rates.

To calculate percentage change, you can use the following formula:

((new value - old value) / old value) x 100

For example, if a stock price increased from $50 to $60, the percentage change would be:

(($60 - $50) / $50) x 100 = 20%

This means that the stock price increased by 20% from its original value.

Similarly, if a price decreased from $100 to $80, the percentage change would be:

(($80 - $100) / $100) x 100 = -20%

This means that the price decreased by 20% from its original value.

Practical Applications of Percentage Change

Percentage change calculations can be used in a variety of practical applications. Here are some examples:


Percentage change is commonly used in finance to track changes in stock prices, interest rates, and other financial metrics. Investors can use percentage change to make informed decisions about buying, selling, or holding stocks.

For example, if an investor notices that a stock price has increased by a significant percentage over a short period of time, they may decide to sell the stock before the price drops. On the other hand, if a stock price has decreased by a significant percentage, they may decide to buy the stock at a lower price.

Sales and Marketing

Percentage change can also be used in sales and marketing to track changes in sales revenue, customer acquisition, and other key performance indicators. Companies can use percentage change to identify trends and make strategic decisions about their marketing and sales strategies.

For example, if a company notices that their sales revenue has increased by a certain percentage after launching a new product, they may decide to invest more in marketing that product to continue the upward trend.


Percentage change can also be used in statistics to measure the effect of a treatment or intervention. Researchers can use percentage change to compare the results of a study to a control group or to previous studies.

For example, if a study found that a new drug reduced symptoms in patients by 25%, this means that the drug had a 25% reduction in symptoms compared to the control group.

In conclusion, percentage change is a fundamental concept in math, statistics, and finance. By mastering this concept and using tools like our Percentage Change Calculator, you can make informed decisions and stay ahead of the curve. We hope this article has helped you better understand percentages and percentage change calculations. If you have any questions or feedback, feel free to contact us.

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