mathematics Verified Precision Tool
Percentage Change Calculator
Calculate the percentage change (increase or decrease) between an old value and a new value.
Calculation Solution
+50.00% Change
Difference: 50
Mathematical Formula
Percentage Change = ((New - Old) / Old) * 100
Overview & Explanation
Percentage change tracks the direction and percentage magnitude of change from an old value to a new value.
How It Works
- Subtract the old value from the new value.
- Divide the result by the absolute old value.
- Multiply by 100.
Practical Applications
- Tracking stock market price movements.
- Measuring monthly expense changes.
Worked Example: Change from 80 to 100
Calculate percentage change.
1
Calculate Difference
100 - 80
= 20
2
Divide by Old and multiply by 100
(20 / 80) * 100
= 25%
Frequently Asked Questions
What does a negative percentage change mean?
A negative percentage change indicates a decrease or drop from the original value.
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