45 -9 = 36
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The GCF of 9, 27, and 45 is 9.
because 9 times 5 = 45
1, 3, 5, 9, 15, 45
9.Why? Because 9 x 6 = 54, and 9 x 5 = 45. No number larger than 9 is both a factor of 54 AND 45.
Since 45 is a multiple of 9, it is automatically the LCM.