Percentage Change Calculator
Increase/Decrease
Calculate percentage increase and decrease between two values instantly. Perfect for analyzing growth rates, price changes, and performance metrics with step-by-step solutions.
📈 Price Increase
Question: Gas price rose from $3.00 to $3.60?
Solution: ((3.60 - 3.00) ÷ 3.00) × 100 = +20%
Result: 20% price increase
💰 Salary Change
Question: Salary changed from $50,000 to $55,000?
Solution: ((55,000 - 50,000) ÷ 50,000) × 100 = +10%
Result: 10% salary increase
📉 Stock Drop
Question: Stock fell from $100 to $85?
Solution: ((85 - 100) ÷ 100) × 100 = -15%
Result: 15% decrease
How to Use This Calculator
Enter Original Value
Type the starting value or original amount
Enter New Value
Type the final value or new amount
Get Instant Results
See the percentage change with step-by-step calculation
The Formula
For example: Change from 100 to 120 = ((120 - 100) ÷ 100) × 100 = +20%
Common Uses
Business Growth
Track revenue growth, customer acquisition, and performance metrics.
Investment Analysis
Calculate stock performance, portfolio changes, and investment returns.
Price Monitoring
Monitor price changes for products, services, and market analysis.
Who Uses This Calculator?
Business Analysts
Track growth rates and performance metrics
Investors
Calculate investment returns and losses
Consumers
Monitor price changes and compare deals
Frequently Asked Questions
Increase shows positive change (+), while decrease shows negative change (-). Both use the same formula.
Yes, but be careful with interpretation. Changing from -10 to -5 is a 50% improvement towards zero.
Percentage change compares new vs. original, while percentage difference compares two values without direction.
Percentage change is undefined when the original value is zero, as you cannot divide by zero.
Step 1: Subtract the original value from the new value.
Step 2: Divide the result by the original value.
Step 3: Multiply by 100 to get the percentage change.
Example: Original price $80, new price $100 → ((100-80)/80)×100 = 25% increase.
Yes. For example, a stock rising from $50 to $150 is a 200% increase. This happens when the new value is more than double the original value.
No. An increase gives a positive percentage, while a decrease gives a negative percentage. For instance, a price drop from $100 to $70 results in -30% change.
It's used in finance to track stock growth, in business to measure sales changes, in education to track score improvements, and even in daily life to calculate discounts or price changes.
Yes, but each period must be calculated separately unless using a compound change formula. For example, a 10% increase in month 1 and 20% in month 2 requires separate calculations or compounding for cumulative change.