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Least Common Denominator (LCD) Calculator

Enter a list of fractions to find the least common denominator — the LCM of the denominators — and rewrite each fraction as an equivalent fraction over the LCD, with full step-by-step working.

LCD = LCM of the denominators
fractions (comma-separated)

Type fractions like a/b separated by commas, e.g. 1/4, 1/6, 3/8. Whole numbers (e.g. 2) are treated as 2/1. Denominators must be positive.

Results

Least common denominator
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LCD
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Denominators
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Equivalent fractions over the LCD
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Step-by-step