CalcSuite Pro

Percentage Calculator

Calculate percentages, percent change, percent increase or decrease, discounts, and tips instantly with clear step-by-step explanations.

Quick Answer

A percentage calculator helps calculate percentages, percent change, discounts, markups, tips, and the percentage relationship between two numbers.

Percentage Formulas

What is X% of Y? result = (X / 100) × Y X is what % of Y? result = (X / Y) × 100 Percent change (X to Y): result = ((Y − X) / X) × 100 Add X% to Y: result = Y × (1 + X/100) Subtract X% from Y: result = Y × (1 − X/100)

X represents the percentage value; Y represents the base number.

Example: Percentage Increase

Given

Mode

Percent Change

Original (X)

50

New Value (Y)

65

Steps

  1. 1Subtract original from new: 65 − 50 = 15
  2. 2Divide by original: 15 / 50 = 0.30
  3. 3Multiply by 100: 0.30 × 100 = 30%

Result

30% increase from 50 to 65

How to Use This Calculator

  1. 1

    Choose a calculation type from the options (e.g., 'What is X% of Y?').

  2. 2

    Enter the first value (percentage or original number) in the X field.

  3. 3

    Enter the second value (base number) in the Y field.

  4. 4

    Click Calculate to see the result and step-by-step breakdown.

  5. 5

    Use Reset to start a new calculation.

Frequently Asked Questions

Use the 'What is X% of Y?' mode. Enter the percentage in the first field and the number in the second field. The result is (X/100) × Y.

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Last updated: June 2026