Subtracting Fractions

Online Subtracting Fractions Calculator

How to Subtract Fractions With Different Denominators

  • 1

    First, check the denominators of the fractions (bottom numbers). if they are not the same numbers, we should make them match.

    Example:
    2
    6
    -
    6
    12
    Multiply each numerator and denominator by the opposite denominator to make the denominator the same.
    =
    2 x 12
    6 x 12
    -
    6 x 6
    12 x 6
    =
    24
    72
    -
    36
    72
  • 2

    We have fractions with identical denominators, so subtract the numerators together to get the numerator result, and the denominator remains the same.

    24
    72
    -
    36
    72
    =
    24 - 36
    72
    =
    -12
    72
  • 3

    Simplify the fraction if necessary by dividing each number of the fraction (numerator and denominator) by the greatest common factor (GCF) of numerator and denominator.
    more how to simplify fractions click here

    Greatest common factor in this fraction is 12

    -12
    72
    =
    -12 ÷ 12
    72 ÷ 12
    =
    -1
    6

How to Subtract Fractions With Common Denominators

  • 1

    Subtracting fractions with identical denominators, by subtracting the numerators together to get the numerator result, and the denominator remains the same.

    4
    8
    -
    2
    8
    =
    4 - 2
    8
    =
    2
    8
  • 2

    Simplify the fraction if necessary by dividing each number of the fraction (numerator and denominator) by the greatest common factor (GCF) of numerator and denominator.
    more how to simplify fractions click here

    Greatest common factor in this fraction is 2

    2
    8
    =
    2 ÷ 2
    8 ÷ 2
    =
    1
    4

Example