Percentage Change Formula:
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Definition: This calculator measures the relative change between an original value and a new value, expressed as a percentage.
Purpose: It helps determine increases or decreases in values like prices, quantities, measurements, or performance metrics.
The calculator uses the formula:
Where:
Explanation: The difference between new and original values is divided by the original value, then multiplied by 100 to convert to a percentage.
Positive Result: Indicates a percentage increase (new value is larger than original).
Negative Result: Indicates a percentage decrease (new value is smaller than original).
Zero Result: Indicates no change between values.
Tips: Enter both original and new values. The calculator handles all numerical values (prices, quantities, measurements, etc.).
Q1: What if my original value is zero?
A: Percentage change is undefined when dividing by zero. The calculator requires a non-zero original value.
Q2: How do I interpret a negative percentage?
A: A negative percentage indicates a decrease from the original value to the new value.
Q3: Can I use this for percentage difference between two values?
A: Yes, the formula works for both increases and decreases between any two values.
Q4: What's the difference between percentage change and percentage points?
A: Percentage change measures relative change from an original value, while percentage points measure absolute differences between percentages.
Q5: How precise are the results?
A: Results are shown to 2 decimal places for precision in most applications.