Finding Common Denominators

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What is a common denominator?

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A common denominator is a number that can be used as a denominator for two or more fractions, allowing them to be compared or added together.

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What is the least common denominator (LCD)?

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The least common denominator (LCD) is the smallest multiple that is common to the denominators of two or more fractions.

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How do you find the least common denominator?

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To find the least common denominator, list the multiples of each denominator and identify the smallest multiple that appears in both lists.

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33

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6

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30

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35

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24

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Why is it important to find a common denominator?

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Finding a common denominator is important for adding, subtracting, or comparing fractions.

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What are multiples?

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Multiples of a number are the results of multiplying that number by whole numbers (e.g., multiples of 3 are 3, 6, 9, 12, ...).