The common factors of 51 and 68 are 1 and 17.
First, determine the greatest common factor of 51 and 68, which is 17. Then, divide both the numerator and the denominator by 17. 51/68 ÷ 17/17 = 3/4
17
1
The GCF of 34, 61, and 68 is 17.
The GCF is 17.
The GCF is 17.
The GCF is 17.
The greatest common factor (GCF) is: 17
1 and 17 You start by "prime factorizing" one of the numbers. It doesn't matter which one ( or, at least, unless you've done factoring for a while). We'll factorize 68, because it's even and thus we know it's divisible by 2. 68/2 = 34 34/2 = 17 Thus, 68 can be rewritten as a product of 2 * 2 * 17. Now, 51 is an odd number, so it can't have 2 as a factor. By process of elimination, the factor must be 17, right?! Wrong! 1 could be the only factor the two have in common (which reminds me, you can probably write "1" for this problem!). But anyways, we should check 17: 51/17 = 3 with 0 remainder. 17 is a factor of 51, and we've determined it's also a factor of 68 from above. Thus it's a factor of both.
The GCF is 17.
factors of 51: 1, 3, 17, 51factors of 68:1, 2, 4, 17, 34, 68GCF: 17
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