Understanding Percentage Fundamentals
The term percent comes from the Latin per centum, meaning “by the hundred.” Whether you are calculating financial investment returns, retail sales discounts, or restaurant tips, percentages normalize ratios into an intuitive scale out of 100.
Basic Formulas
- Finding X% of Y:
(X / 100) × Y - Finding what % X is of Y:
(X / Y) × 100 - Percentage Change:
((New - Old) / Old) × 100
Use our interactive Percentage Calculator for instant calculations.