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Subtract 20/30 from 7/54

7/54 - 20/30 is -29/54.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 54 and 30 is 270

    Next, find the equivalent fraction of both fractional numbers with denominator 270
  2. For the 1st fraction, since 54 × 5 = 270,
    7/54 = 7 × 5/54 × 5 = 35/270
  3. Likewise, for the 2nd fraction, since 30 × 9 = 270,
    20/30 = 20 × 9/30 × 9 = 180/270
  4. Subtract the two like fractions:
    35/270 - 180/270 = 35 - 180/270 = -145/270
  5. After reducing the fraction, the answer is -29/54

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