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Subtract 20/56 from 18/30

18/30 - 20/56 is 17/70.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 30 and 56 is 840
  2. For the 1st fraction, since 30 × 28 = 840,
    18/30 = 18 × 28/30 × 28 = 504/840
  3. Likewise, for the 2nd fraction, since 56 × 15 = 840,
    20/56 = 20 × 15/56 × 15 = 300/840
  4. Subtract the two fractions:
    504/840 - 300/840 = 504 - 300/840 = 204/840
  5. After reducing the fraction, the answer is 17/70

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