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Find the prime factors of each, and multiply groupings of common factors, as well as individual, ungrouped factors, and you have the LCD (least common denominator):

35 = 5 * 7

49 = 7 * 7

LCD = 5 * 7 * 7 = 245

To get the GCF (greatest common factor), multiply groupings of common factors:

GCF = 7

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11y ago

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