# Arithmetic : Fractions

A fraction has been simplified or reduced to lowest terms when there are no common factors in its numerator and denominator except 1.
To simplify a fraction or reduce it to an equivalent fraction in lowest terms, cancel all common factors in the numerator and denominator.
To reduce a fraction to lowest terms, divide both numerator and denominator by their greatest common divisor (GCD). The GCD of 30 and 105 is 15.
Note that to ensure a fraction is in its simplest form, the numerator
and denominator may be written as the product of primes with no common
factors.
GMAT Math Review - Arithmetic : Practice Exercise for Fractions |

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