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Bot GPT 3.5 To simplify 9/18 using the greatest common factor (GCF), we need to find the largest number that evenly divides both 9 and 18.
The GCF of 9 and 18 is 9.
Dividing both the numerator and denominator by 9, we get:
9/18 = 1/2
So, 9/18 simplified using the GCF is 1/2.