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Subtract 9/35 from 1/21

1/21 - 9/35 is -22/105.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 21 and 35 is 105

    Next, find the equivalent fraction of both fractional numbers with denominator 105
  2. For the 1st fraction, since 21 × 5 = 105,
    1/21 = 1 × 5/21 × 5 = 5/105
  3. Likewise, for the 2nd fraction, since 35 × 3 = 105,
    9/35 = 9 × 3/35 × 3 = 27/105
  4. Subtract the two like fractions:
    5/105 - 27/105 = 5 - 27/105 = -22/105

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