In math it means Greatest Common Factor. Any two or more numbers will have some factors, or divisors, in common.. The largest of these common factors is the GCF. For example.
Take 12 and 14
The factors of 12 are 1,2,3,4,6,and 12 and of 14 they are 1,2,7,and 14.
The common factors are 1 and 2 and 2 is the greatest so it is the GCF. GCF stands for greatest common factor == A GCF exactly is called greatest common factor. For example: the factors of 8 and 18 are 8== 1,2,4,8; 18=1,2,3,6,9,18. So you look at the factors of both numbers and the greatest one is 2. So the GCF of 8 and 18 is 2. [: Hope this helps :] ===
Greatest common factor.
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GCF doesn't apply to fractions, only to whole numbers. When those numbers are the numerator and denominator of a fraction, the GCF can be used to reduce it to its simplest form.
LCD:Lowest Common Denominator GCF:Greatest Common Factor
Find the GCF of the numerator and denominator and divide them both by it. If the GCF is 1, the fraction is in its lowest terms, also known as simplest form.
By GCF you mean Greatest Common Divisor = 72
The GCF for 16 24 18 is 2.