About Percentage Calculator

Our free percentage calculator solves any percentage problem instantly — with step-by-step explanations. Whether you're calculating discounts, tips, taxes, grades, or investment returns, our tool gives you accurate answers in seconds.

Features

• What is X% of Y?
• X is what percent of Y?
• Percentage change (increase or decrease)
• Percentage increase calculator
• Percentage decrease calculator
• Step-by-step solutions for every calculation
• Handles decimals and negative numbers
• 100% free, no signup, no download

Percentage Formulas

A percentage expresses a number as a fraction of 100. The key formulas: Percent of = (percent ÷ 100) × whole; Percent rate = (part ÷ whole) × 100; Percent change = ((new − old) ÷ old) × 100.