Exact BigInt · step by step

➗ Fraction Calculator

Add, subtract, multiply, divide and compare fractions, mixed numbers and decimals with exact BigInt arithmetic — see the common denominator, the reduction and every intermediate step written out like a notebook.

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Simplify / convert one value

Inputs accept fractions “7/8”, mixed numbers “3 1/4”, integers and decimals “2.5” (negative allowed). Decimals convert exactly (0.375 = 3/8). Comparison cross-multiplies to avoid rounding.