Percentage Calculator

Calculate percentages with step-by-step solutions for 100+ popular problems

100+

Problems Solved

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Detailed Solutions

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How to Calculate Percentages

Simple 3-Step Method

  1. 1
    Convert percentage to decimal: Divide the percentage by 100. For example, 25% becomes 0.25
  2. 2
    Multiply by the number: Take your decimal and multiply it by the number. For example, 0.25 × 80 = 20
  3. 3
    You have your answer! That's it - simple multiplication gives you the result

Quick Tips for Mental Math

  • 10%: Just move the decimal point one place left
  • 50%: Simply divide by 2 (half the number)
  • 25%: Divide by 4 (one quarter)
  • 20%: Divide by 5 (one fifth)

Common Uses of Percentages

Shopping & Sales

Calculate discounts, sales tax, and total prices

School & Testing

Convert test scores and calculate grades

Finance & Tips

Calculate tips, interest rates, and investments

Statistics & Data

Understand polls, surveys, and data analysis