Universal Percentage Calculation Guide
Percentages are ubiquitous in finance, shopping, statistics, and daily life. This universal calculator handles all standard percentage problems.
Core Formulas
1. What is P% of X?
Result = X × (P / 100)
Example: What is 15% of 200? 200 × 0.15 = 30.
2. X is what percent of Y?
Percentage (%) = (X / Y) × 100%
Example: 25 is what percent of 80? (25 / 80) × 100 = 31.25%.
3. X is P% of what?
Total = X / (P / 100)
Example: 40 is 20% of what? 40 / 0.20 = 200.
4. Percentage change from X to Y
Change (%) = [(Y - X) / |X|] × 100%
Example: Change from 50 to 75: ((75 - 50) / 50) × 100 = +50%.