Download Article Show Download Article In mathematics, the concept of percent change is used to describe the relationship between an old value and new value. Specifically, the percent change expresses the difference between the old and new values as a percentage of the old value. Use the equation ((V2 - V1) / V1) × 100, in which V1 represents an old or initial value and V2 represents the new or current value. If the number is positive, it indicates a percent increase and if it’s negative, it indicates a percent decrease. You can also use a modified formula to determine percent decrease rather than working with negative numbers. Sample Percent Change Calculator
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ReferencesAbout This ArticleArticle SummaryX To calculate percent change, start by determining both the old and new values for the amount that has changed. Next, subtract the old value from the new value. Then, divide the answer by the old value. Finally, multiply that number by 100 to get the percent change. For example, if the original value of something was 30 and then went up to 50, you would subtract 30 from 50 to get 20. Then, you would divide 20 by 30 and get 0.033. Finally, multiply that by 100 to get a final answer of 33 percent. For tips on how to find the percent change when there are more than two values, read on. Did this summary help you? Thanks to all authors for creating a page that has been read 616,719 times. Reader Success Stories
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