Calculating Percent Change
How do I calculate percent change?
Great question! We can use this formula to calculate percent change:
A positive answer indicates a percent increase, and a negative answer indicates a percent decrease.
Read below to learn more.
The Percent Change Equation
When you go shopping on Black Friday and Cyber Monday, you’ll probably see coupons like “ off select items!” or “ off your entire order!”
These coupons are examples of percent change. We use percent change when an increase or decrease in value is based on the starting, or initial, value.
50% off tells us that if the initial value is $100, the final value is $50, which is a decrease of $50. If the initial value is $200, the final value is $100, which is a decrease of $100. The value of the decrease isn't always the same, but the percent decrease does stay the same.
The following fraction gives us the portion of the initial value that changed:
We know we need to multiply decimals by to change them to percents, so the percent change formula is equal to:
Percent change can be positive or negative. If our final value is bigger than our initial value, then we have a percent increase, and our percent change is positive.
If our final value is smaller than our initial value, we have a percent decrease, and our percent change is negative.
Our Percent Change Calculator below can help you solve for percent change, whether you're calculating percent increase or percent decrease, and can also help you find the initial or final values.
Percent Change Calculator
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What is the percent change from to ?