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Subtract 3/5 from 6/21

6/21 - 3/5 is -11/35.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 21 and 5 is 105

    Next, find the equivalent fraction of both fractional numbers with denominator 105
  2. For the 1st fraction, since 21 × 5 = 105,
    6/21 = 6 × 5/21 × 5 = 30/105
  3. Likewise, for the 2nd fraction, since 5 × 21 = 105,
    3/5 = 3 × 21/5 × 21 = 63/105
  4. Subtract the two like fractions:
    30/105 - 63/105 = 30 - 63/105 = -33/105
  5. After reducing the fraction, the answer is -11/35

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