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The GCD is also known as the greatest common factor (gcf), highest common factor (hcf) , greatest common measure (gcm), or highest common divisor.
Example: the Gcd for 12 and 80 is 4.
In mathematics, the greatest common divisor (gcd) of two or more numbers / integers, when at least one of them is different from zero, is the largest positive integer that divides the numbers without a remainder.
The greatest common divisor is useful for reducing fractions to be in lowest terms.
