Percentage Calculator
Calculate percentages, percentage changes, and more.
A Percentage Calculator computes percentage increases, decreases, proportional differences, and common fractions using standard formulas with step-by-step explanations client-side.
Percentage increase and decrease reflect relative changes compared to baseline values.
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How to Use Percentage Calculator
Choose calculation type
Select what type of percentage calculation you need.
Enter values
Type the numbers for your calculation.
View result
See the calculated percentage instantly.
Practical Examples & Conversions
20% of 150
30
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Authoritative Standards & Citations
Calculations and algorithms on this page are implemented and verified in strict accordance with the following official technical specifications:
IEEE 754: Standard for Floating-Point Arithmetic
Industry standard for floating-point computation formats, rounding rules, and arithmetic.
Reserve Bank of India (RBI) Lending Guidelines & Amortization Rules
Standardized interest compounding frequency and EMI calculation guidelines.