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Subtract 8/20 from 5/84

5/84 - 8/20 is -143/420.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 84 and 20 is 420

    Next, find the equivalent fraction of both fractional numbers with denominator 420
  2. For the 1st fraction, since 84 × 5 = 420,
    5/84 = 5 × 5/84 × 5 = 25/420
  3. Likewise, for the 2nd fraction, since 20 × 21 = 420,
    8/20 = 8 × 21/20 × 21 = 168/420
  4. Subtract the two like fractions:
    25/420 - 168/420 = 25 - 168/420 = -143/420

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