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Subtract 21/27 from 30/75

30/75 - 21/27 is -17/45.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 75 and 27 is 675

    Next, find the equivalent fraction of both fractional numbers with denominator 675
  2. For the 1st fraction, since 75 × 9 = 675,
    30/75 = 30 × 9/75 × 9 = 270/675
  3. Likewise, for the 2nd fraction, since 27 × 25 = 675,
    21/27 = 21 × 25/27 × 25 = 525/675
  4. Subtract the two like fractions:
    270/675 - 525/675 = 270 - 525/675 = -255/675
  5. After reducing the fraction, the answer is -17/45

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