When the numerator and denominator have only 1 as a common factor

4 answers

Yeah, that tends to happen sometimes.
When a fraction is reduced, or simplified, fraction.

A fraction in which the greatest common factor of the numerator and the denominator is 1 is a reduced, or simplified, fraction.

For example:

6 / 8 is not reduced (or not simplified) because 6 / 8 = 2 ∙ 3 / 2 ∙ 4 = 3 / 4

3 / 4 is a reduced, or simplified, fraction.

Also 6 / 7 , 12 / 5 , 19 / 14 etc. is a reduced, or simplified, fractions.

You can use prime factorization ( if you know what it is ) to reduce fractions.
form all quotient that have factors of 1 in the numerator and factors of 2 in the numerator
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