25% increase from 100 to 125
25
increase
((125 - 100) / |100|) × 100
A Percentage Change Calculator measures the percentage increase or percentage decrease between an original value and a new value. It helps compare values, analyze growth rate, evaluate performance, and track progress across finance, business, economics, and everyday calculations.
Our percentage change calculator instantly calculates percentage change, increase, decrease, and difference between two values.
Enter the old value and the new value.
Choose Percentage Change, Increase, Decrease, or Difference.
Instantly view and copy the percentage change, direction, and calculation formula.
Enter the old value and the new value.
Choose Percentage Change, Increase, Decrease, or Difference.
Instantly view and copy the percentage change, direction, and calculation formula.
Understand the core terms behind percentage change to calculate accurate results and compare values confidently.
A percentage expresses a value as parts per hundred. It helps compare quantities, measure growth, analyze trends, and evaluate performance across different datasets.
The original value is the starting or base value before any increase or decrease. It serves as the denominator in the percentage change formula.
The new value is the updated or final value after change. Compare it with the original value to calculate percentage increase, decrease, or relative change.
Absolute change is the numerical difference between the new value and the original value. It shows how much a value changed before converting it into a percentage.
Percentage change represents the relative increase or decrease from the original value. It provides a standardized way to compare changes between different values.
You can calculate percentage change manually by finding the difference between the original value and the new value, then dividing that difference by the original value. Finally, multiply the result by 100 to convert it into a percentage.
Suppose a company's monthly sales increased from 200 to 260.
Difference:
Percentage Change:
The sales increased by 30%.
Percentage change helps measure growth, decline, and performance across personal, academic, and professional activities.
Track investment returns, revenue growth, expenses, and profitability over time.
Compare sales growth, KPIs, customer acquisition, and business performance.
Measure inflation, market trends, production changes, and economic growth rates.
Calculate increases or decreases in population across years or regions.
Compare exam scores, grades, and learning progress between assessments.
Common Percentage Change Mistakes
Common mistakes include using the wrong original value, reversing the calculation order, confusing percentage change with percentage difference, ignoring negative values, and forgetting to multiply the final ratio by 100.
Percentage change compares a new value with an original value and indicates growth or decline over time. Percentage difference compares two independent values without treating either as the starting point. Use percentage change for performance tracking and percentage difference for comparing separate measurements.
Use math calculators for algebra, geometry, percentages, fractions, equations, and more.
Learn the answers to common questions about percentage change, formulas, calculations, and practical applications.