This free online percent change calculator will calculate the numerical difference, percent difference, fractional change, and percent change from one number to another.
Plus, unlike the majority of online percentage calculators, this percentage change calculator allows you to choose the decimal rounding, explains how it arrived at the given result, and shows a visual representation of the result in a bar chart.
If you would like to calculate what percent one number is of another, or calculate numbers from a percentage, please visit the Percent Calculator.
The formula used for calculating percent increase or decrease is as follows:
% Change  =  (  V_{2}  V_{1}  )  100 
V_{1} 
To see how the percent change formula works, let's suppose you wanted to calculate the percent change in the cost of attending college from the previous year. If the tuition last year was $5,000, and tuition this year is $5,500, here is how you would calculate the percent increase in college tuition:
% Chg.  =  (  5500  5000  )  100 
5000 
% Chg.  =  (  500  )  100 
5000 
% Chg.  =  0.10 * 100 
Change  =  10% Increase 
On the other hand, let's suppose tuition last year was $5,500, and tuition this year is $5,000 (I know, wishful thinking), here is how you would calculate the percent decrease in college tuition:
% Chg.  =  (  5000  5500  )  100 
5500 
% Chg.  =  (  500  )  100 
5500 
% Chg.  =  0.0909 * 100 
Change  =  9.09%, or a 9.09% Decrease 
If you are wondering why a 500 increase results in a higher percentage change (10%) than a 500 decrease (9.09%) in the above example, it's because the denominator in the percentage change formula is always greater in the case of a percentage decrease (higher of the two numbers is the divisor).
With that, let's use the percentage change calculator to calculate percent increase or decrease.

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