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To find the greatest common factor, or GCF, you must first identify the factors for each number.
For 150, its factors are 1, 2, 3, 5, 6, 10, 15, 25, 30, 50, 75, and 150.
For 225, its factors are 1, 3, 5, 9, 15, 25, 45, 75, and 225.
75 is the highest (or greatest) factor they have in common, so the GCF for 150 and 225 is 75

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10y ago

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