Simplest form in fractions is where the numerator and the denominator do not share any factors other than 1, i.e. they are relatively prime. For instance, 9/12 is not in simplest form, but 3/4 is.
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Fractions are in their simplest form when the GCF of numerator and denominator is one.
Factor the numerator and denominator, and then cancel any common factors.
-- Find any common factor of the numerator and denominator, and divide numerator and denominator by it. -- Keep doing that until the numerator and denominator no longer have any common factor except ' 1 '. The fraction is then in its simplest form.
In mathematics, when we refer to a fraction being in its simplest form, we mean that the numerator and denominator have no common factors other than 1. Fractions that are not in simplest form would have common factors between the numerator and denominator that can be further reduced. For example, 4/8 is not in simplest form because both 4 and 8 can be divided by 4 to simplify the fraction to 1/2. Similarly, 10/15 is not in simplest form as both 10 and 15 can be divided by 5 to simplify the fraction to 2/3.
There are an infinite number of fractions that are all equal to 21/49 .The one in lowest terms (simplest form) is 3/7.