By CalculatorInn Team · Updated: 2026-03-22 · Free & accurate · Instant results
Perform arithmetic operations on fractions including addition, subtraction, multiplication, and division with automatic simplification.
Interactive Fraction Calculator
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a/b + c/d = (ad + bc) / bd; a/b × c/d = ac / bd
For addition/subtraction, find a common denominator by cross-multiplying. For multiplication, multiply across. For division, flip the second fraction and multiply. Always simplify by dividing by GCD.
Cross-multiply: (a/b) + (c/d) = (a×d + b×c) / (b×d), then simplify by dividing numerator and denominator by their GCD.
Find the greatest common divisor (GCD) of the numerator and denominator, then divide both by it. For example, 8/12: GCD is 4, so simplified is 2/3.
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