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SMO Financial Calculator
Everyday Money

Percentage Calculator

Solve common percentage questions, including percent of a number, percentage change, and part-to-whole ratios.

Result

50.00

Formula

X% of Y = (X ÷ 100) × Y

Percentage change = ((new − original) ÷ original) × 100

How it works

  1. 1

    Choose the question

    Select percent of a number, part of a whole, or percentage change.

  2. 2

    Enter both values

    The labels update to match the calculation.

  3. 3

    Read the result

    Use two-decimal precision for budgeting, pricing, and comparison.

Common use cases

  • Calculating a pay rise
  • Measuring budget changes
  • Finding a savings rate
  • Comparing investment returns
  • Splitting shared costs
  • Checking profit margins

Frequently Asked Questions

  • It is the direct difference between percentages. A move from 10% to 12% is two points but a 20% relative increase.