When their GCF is 1.
For the purpose of reducing fractions to their lowest terms.
When you need to reduce fractions to their simplest form.
-- Take the information given with the question. -- Think over what you know about fractions. -- Use the given information, combined with what you know about fractions, to find the missing information.
there is no highest common factor
When reducing fractions to their lowest terms
You can add or subtract fractions only if they are "like" fractions, that is, only if they have the same denominator - unless you know your fractions really well.
''The least common factor of you know what is.1
When reducing fractions to their lowest terms
switch numbers and multiply you should know that
Reducing fractions to their lowest terms by finding their highest common factor of the numerator and denominator When adding or subtracting fractions with different denominators by finding their lowest common multiple
You have to get a common denomanator to then work out if the numerator is also the same.
The greatest common factor, or GCF, is the largest positive integer that will divide evenly with no remainder into all the members of a given set of numbers. When applied to a numerator and a denominator, it is a way to reduce equivalent fractions to their simplest form. The GCF of 6 and 9 is 3. If you divide 6 and 9 by 3, you get 2 and 3. 6/9 = 2/3 The GCF of 2 and 3 is 1. If the GCF of a numerator and a denominator is 1, the fraction is in its simplest form.