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Fractions in Lowest Terms
A fraction is said to written usinglowest termsif itsnumeratoranddenominatorarerelatively prime, that is, they have no commonfactorsother than. (Some books use "simplest form" to mean the same thing.)
So,is written in lowest terms, sinceandhave no common factors other than. Butis not;andhave a common factor.
To writein lowest terms, divide both the numerator and denominator by thegreatest common factor, in this case:
Sowritten in lowest terms is.
This is known asreducing fractions.