MathUpdated 2026-06-15

Percentage Calculator

Calculate percentages instantly. Free online percentage calculator for percentage increase, decrease, and value calculations.

Calculator widget coming soon. Use the information below to understand this tool.

Overview How It Works Formula Examples Benefits FAQ Related

What is Percentage Calculator?

A percentage calculator helps you compute various percentage calculations including finding a percentage of a number, percentage increase/decrease, and percentage change between two values.

How It Works

The calculator provides three main operations: X% of Y = Z, what percentage is X of Y, and percentage increase/decrease from X to Y.

Formula & Calculation Method

X% of Y = (X/100) × Y. X as % of Y = (X/Y) × 100. Change = ((New - Old)/Old) × 100

Choose the operation you need, enter the values, and get instant results.

Examples

Find Percentage of Number

115% of 200

2= (15/100) × 200

3= 0.15 × 200

4= 30

15% of 200 = 30

Benefits

1
Quick calculations
2
Multiple percentage operations
3
Educational tool
4
Shopping discount helper
5
Business analysis tool

Common Use Cases

Discount calculationsTax rate applicationsAcademic gradingData analysisBusiness metrics

Expert Tips

1
Double-check the base value in calculations
2
Use percentage points for rate comparisons
3
Round final answers appropriately
4
Verify with reverse calculation

Common Mistakes to Avoid

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Confusing percentage points with percent
!
Wrong order in change calculations
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Dividing by wrong base value
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Forgetting to multiply by 100
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Rounding errors

Frequently Asked Questions

Find answers to common questions about this calculator below.

Percentage of a number = (Percentage/100) × Number. For example, 15% of 200 = (15/100) × 200 = 30.

Percentage increase = ((New Value - Original Value)/Original Value) × 100. For example, if a price increases from ₹100 to ₹120, the increase is 20%.