Calculate the exact percentage change between two values. Determine whether it's an increase or decrease, measure growth or decline, and understand the relative change with step-by-step explanations.
A stock price rises from $50 to $75.
Percentage Change = (75 - 50) ÷ |50| × 100 = +50% (Increase)
The stock gained $25 per share, a 50% increase from its original price.
A product's price drops from $80 to $60.
Percentage Change = (60 - 80) ÷ |80| × 100 = -25% (Decrease)
The product is now 25% cheaper, saving you $20 on the original price.
A house valued at $250,000 is now worth $300,000.
Percentage Change = (300,000 - 250,000) ÷ |250,000| × 100 = +20% (Increase)
The property appreciated by 20%, adding $50,000 in value.
A town's population fell from 10,000 to 8,500.
Percentage Change = (8,500 - 10,000) ÷ |10,000| × 100 = -15% (Decrease)
The population decreased by 15%, a loss of 1,500 residents.
A positive percentage change indicates an increase in value. A negative percentage change indicates a decrease.
You cannot calculate percentage change from zero (division by zero). If the original value is zero, describe the change in absolute terms.
Percentage increase has no upper bound — a value can increase by 200%, 500%, or more. However, a decrease is capped at -100%.
A large percentage change on a small base may be less significant than a small percentage change on a large base.
Percentage change is a mathematical measure that quantifies the relative difference between two values over time. It expresses how much a quantity has increased or decreased in proportion to its original value, making it easy to compare changes across different scales and contexts. Unlike absolute difference, which tells you the raw change in numbers, percentage change tells you the significance of that change relative to where you started.
For example, a $10 change on a $100 item (10%) carries a very different meaning than a $10 change on a $1,000 item (1%). By using percentages, you can meaningfully compare growth rates in salaries, stock prices, populations, sales figures, and countless other metrics regardless of their absolute size.
Percentage change is one of the most essential mathematical concepts used in finance, business, economics, and everyday decision-making. It helps you evaluate investment returns, negotiate salaries, analyze business performance, track inflation, understand population trends, and much more. Knowing how to calculate and interpret both positive and negative percentage changes is a fundamental skill for making informed decisions in a data-driven world.
Our percentage change calculator is invaluable across countless real-world scenarios. Here are some of the most common applications:
Calculate raises, compare job offers, or track how your earnings have changed from year to year.
Track property value appreciation or depreciation, rent increases, and housing market trends.
Measure portfolio returns, stock price movements, and the growth or decline of your investments.
Analyze revenue growth, sales performance, customer counts, and market share changes over time.
Compare price changes, track inflation on groceries, and understand how your purchasing power has shifted.
Calculate grade improvements, test score changes, survey result shifts, and scientific data trends.
=((B1-A1)/ABS(A1))*100 where A1 is the original value and B1 is the new value. Using ABS() ensures the formula works correctly even if the original value is negative. For example, if A1=100 and B1=150, the formula returns 50. If A1=100 and B1=75, it returns -25. You can also format the cell as a percentage and use =(B1-A1)/ABS(A1) to display results as 50.00% or -25.00%.
⚠️ Important Note: While our Percentage Change Calculator provides accurate mathematical results, always consider the context and scale of the values involved. A large percentage change on a small base might be less significant than a small percentage change on a large base. Use this tool as a guide and verify critical financial or business calculations with professional advisors.