Percentage Change Calculator

Find the percentage change between any two values. The result is signed: positive for increases, negative for decreases. Includes step-by-step formula breakdown.

From (Old Value)

To (New Value)

▲ Increase

+25.00%

Absolute change

+25.00

Calculation

Step 1: 125.00 − 100.00 = +25.00

Step 2: +25.00 ÷ |100.00| = 0.2500

Step 3: × 100 = +25.00%

Formula & Quick Examples

Formula

% Change = ((New Value − Old Value) ÷ |Old Value|) × 100

Use |Old Value| (absolute value) to handle negative starting values correctly.

Scenario	From	To	% Change
Stock price	$50	$75	+50.00%
Monthly sales	1,200	900	−25.00%
Test score	72	88	+22.22%
Website bounce	75%	55%	−26.67%
Revenue YoY	$80K	$120K	+50.00%

Frequently Asked Questions

What is percentage change? ▼

Percentage change measures how much a value changed relative to its original value. Formula: ((New − Old) ÷ |Old|) × 100. Positive = increase, negative = decrease.

What is the percentage change from 80 to 100? ▼

((100 − 80) ÷ 80) × 100 = 25% increase.

What is the difference between percentage change and percentage difference? ▼

Percentage change has direction (from old to new) and divides by the original value. Percentage difference has no direction and divides by the average of both values.

How do I calculate a percentage change increase from 50 to 75? ▼

((75 − 50) ÷ 50) × 100 = 50% increase.

Can percentage change be more than 100%? ▼

Yes. If a value doubles, the percentage change is 100%. If it triples, it's 200%. There is no upper limit for increases.

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