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Subtract 7/40 from 8/84

8/84 - 7/40 is -67/840.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 84 and 40 is 840
  2. For the 1st fraction, since 84 × 10 = 840,
    8/84 = 8 × 10/84 × 10 = 80/840
  3. Likewise, for the 2nd fraction, since 40 × 21 = 840,
    7/40 = 7 × 21/40 × 21 = 147/840
  4. Subtract the two fractions:
    80/840 - 147/840 = 80 - 147/840 = -67/840

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