The percentage calculator covers everyday percentage scenarios. Three modes: 1. Find percentage: X is what % of Y? (X ÷ Y × 100) 2. Find value: what is Y% of X? (X × Y%) 3. Find change rate: from X to Y, what's the % change? Common use cases: • Salary raise calculation (what is a 10% raise) • Discount calculation (what is 30% off) • Test score calculation (correct rate / score rate) • Growth rate in market data analysis • Year-over-year / quarter-over-quarter comparisons

Disclaimer: This calculator provides estimates for informational purposes only. Not financial advice.