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Fraction Calculator

Add, subtract, multiply, and divide fractions with instant simplification, mixed number display, and decimal values.

Fraction Calculator Interactive Workspace

Client-side calculations and instant parameter controls are initializing. All processing occurs securely in your browser.

How to Use the Fraction Calculator

  1. 1 Enter numerator and denominator for the first fraction.
  2. 2 Select the arithmetic operator (+, -, ร—, รท).
  3. 3 Enter numerator and denominator for the second fraction.
  4. 4 View the simplified fraction, mixed number, and decimal equivalent.

Mathematical Formula & Principle

a/b + c/d = (ad + bc) / bd (Reduced by Greatest Common Divisor)

Calculations are performed with IEEE floating point mathematical precision directly in your device memory.

Worked Examples

Adding Fractions

Input: 3/4 + 2/5
Result: 23/20 = 1 3/20 (Decimal: 1.1500)

Finds common denominator 20: (15 + 8)/20 = 23/20.

Frequently Asked Questions

How do you simplify a fraction to lowest terms?
Find the Greatest Common Divisor (GCD) of both the numerator and denominator, then divide both by that number.

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