Find a common denominator

Enter the list of numbers and you will immediately see the common denominator.

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The Common Denominator Calculator is a handy tool that helps you solve problems involving fraction operations. A common denominator is a denominator that is common to two or more fractions. This tool is especially useful when adding or subtracting fractions, since you need to have the same denominators to perform these operations.

You can enter up to 5 fractions in this calculator. Each fraction must consist of two numbers separated by a "/", for example, 5/7.