免费百分比变化计算器(进阶)
计算两个值之间的百分比变化，区分增长和下降。
Pct Change
15.00 %
公式
## Percentage Change vs Percentage Difference ### Percentage Change **% Change = ((New - Original) / |Original|) × 100** Used when there is a clear "before" and "after" value. ### Percentage Difference **% Difference = |New - Original| / ((|Old| + |New|) / 2) × 100** Used when comparing two values without a clear reference (e.g., comparing two measurements).
计算示例
A value changed from 80 to 92.
- 01% Change = (92 - 80)/80 × 100 = 12/80 × 100 = 15%
- 02% Difference = 12/86 × 100 ≈ 13.95%
- 03Absolute change = 12
- 04Ratio = 92/80 = 1.15
常见问题
What is the difference between percentage change and percentage difference?
Percentage change uses the original value as the denominator (directional). Percentage difference uses the average of both values (symmetric, no direction).
Can percentage change be negative?
Yes, a negative percentage change indicates a decrease. For example, going from 100 to 80 is a -20% change.
What is percentage error?
Percentage error = |experimental - theoretical| / |theoretical| × 100. It measures the accuracy of a measurement against a known standard.
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