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common denominator The largest factor that two (or more) numbers have in common is known as the "greatest common factor" in the United States, abbreviated as GCF, or the "highest common factor" in Europe, abbreviated as HCF. Occasionally, the term "divisor" is substituted for "factor".
To compare two fractions, convert them to a common denominator.To compare two fractions, convert them to a common denominator.To compare two fractions, convert them to a common denominator.To compare two fractions, convert them to a common denominator.
an angle precisely defined as the common endpoint of two rays
The common denominator of four fifths and two ninths is 45.
Adjacent angles have a common side and a common vertex.