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Subtract 56/20 from 18/7

1st number: 2 4/7, 2nd number: 2 16/20

18/7 - 56/20 is -8/35.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 7 and 20 is 140

    Next, find the equivalent fraction of both fractional numbers with denominator 140
  2. For the 1st fraction, since 7 × 20 = 140,
    18/7 = 18 × 20/7 × 20 = 360/140
  3. Likewise, for the 2nd fraction, since 20 × 7 = 140,
    56/20 = 56 × 7/20 × 7 = 392/140
  4. Subtract the two like fractions:
    360/140 - 392/140 = 360 - 392/140 = -32/140
  5. After reducing the fraction, the answer is -8/35

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