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Subtract 18/84 from 5/40

5/40 - 18/84 is -5/56.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 40 and 84 is 840

    Next, find the equivalent fraction of both fractional numbers with denominator 840
  2. For the 1st fraction, since 40 × 21 = 840,
    5/40 = 5 × 21/40 × 21 = 105/840
  3. Likewise, for the 2nd fraction, since 84 × 10 = 840,
    18/84 = 18 × 10/84 × 10 = 180/840
  4. Subtract the two like fractions:
    105/840 - 180/840 = 105 - 180/840 = -75/840
  5. After reducing the fraction, the answer is -5/56

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