📊 Percentage Calculator

Calculate percentages quickly and accurately. Choose from multiple calculation types below.

🔢 Calculate X% of Y

Percentage (%):

Of Number:

❓ What % is X of Y

Number X:

Of Number Y:

📈 Percentage Change

Original Value:

New Value:

➕ Add/Subtract %

Starting Number:

Percentage (use - for subtract):

🔄 Reverse Percentage

Final Value:

Percentage Increase (%):

⚖️ Percentage Difference

Value 1:

Value 2:

💡 Common Percentage Problems

What is 20% of 150?

50 is what % of 200?

25%

Increase 100 by 25%

125

% change from 80 to 100?

+25%

Original if 120 is after 20% increase?

100

% difference between 40 and 60?

40%

📐 Percentage Formulas

X% of Y

Result = (X / 100) × Y

What % is X of Y

% = (X / Y) × 100

Percentage Change

% = ((New - Old) / Old) × 100

Add %

Result = N × (1 + P/100)

❓ Frequently Asked Questions

What is a percentage?

A percentage is a number expressed as a fraction of 100. The symbol % means "per hundred". For example, 25% means 25 out of 100.

How do I calculate percentage increase?

Percentage increase = ((New Value - Original Value) / Original Value) × 100. For example, if a price goes from $50 to $60, the increase is 20%.

What's the difference between percentage change and percentage difference?

Percentage change compares new to old value. Percentage difference compares two values to their average, useful when neither is a clear baseline.

Can percentages be negative?

Yes! A negative percentage indicates a decrease. For example, -15% means a 15% reduction.