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It's essentially the same process as finding the least common multiple of whole numbers.

Example: 1/30 and 1/42

Factor them.

2 x 3 x 5 = 30

2 x 3 x 7 = 42

Combine the factors, eliminating duplicates.

2 x 3 x 5 x 7 = 210, the LCD

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You do nowt

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11y ago
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Q: How do you find a common denominator for fractions?
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