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Subtract 24/42 from 21/75

21/75 - 24/42 is -51/175.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 75 and 42 is 1050

    Next, find the equivalent fraction of both fractional numbers with denominator 1050
  2. For the 1st fraction, since 75 × 14 = 1050,
    21/75 = 21 × 14/75 × 14 = 294/1050
  3. Likewise, for the 2nd fraction, since 42 × 25 = 1050,
    24/42 = 24 × 25/42 × 25 = 600/1050
  4. Subtract the two like fractions:
    294/1050 - 600/1050 = 294 - 600/1050 = -306/1050
  5. After reducing the fraction, the answer is -51/175

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