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Percent Change

A series of free Basic Algebra Lessons.

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The following diagram gives the formula to find percent changes. Scroll down the page for more examples and solutions.

Percent Changes

Percent Change
In math, sometimes we want to calculate the percent that something changes. Percent changes are often seen in word problems and are useful in many real world situations, for example when shopping sales or when calculating a tip. A percent change is a way to describe how much a quantity increases or decreases. For example, when you buy an item with tax, the tax is the percent change from the original price to what you paid.

Percent of Change
This video explains how to determine percent of change.
Percent of Change (percent increase or decrease)
How to calculate percent change?

Percent Increase or Decrease
Lesson on finding percent of change

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You can use the free Mathway calculator and problem solver below to practice Algebra or other math topics. Try the given examples, or type in your own problem and check your answer with the step-by-step explanations.

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