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Subtract 21/16 from 8/84

1st number: 8/84, 2nd number: 1 5/16

8/84 - 21/16 is -409/336.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 84 and 16 is 336

    Next, find the equivalent fraction of both fractional numbers with denominator 336
  2. For the 1st fraction, since 84 × 4 = 336,
    8/84 = 8 × 4/84 × 4 = 32/336
  3. Likewise, for the 2nd fraction, since 16 × 21 = 336,
    21/16 = 21 × 21/16 × 21 = 441/336
  4. Subtract the two like fractions:
    32/336 - 441/336 = 32 - 441/336 = -409/336

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