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Subtract 90/42 from 63/84

1st number: 63/84, 2nd number: 2 6/42

63/84 - 90/42 is -39/28.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 84 and 42 is 84

    Next, find the equivalent fraction of both fractional numbers with denominator 84
  2. For the 1st fraction, since 84 × 1 = 84,
    63/84 = 63 × 1/84 × 1 = 63/84
  3. Likewise, for the 2nd fraction, since 42 × 2 = 84,
    90/42 = 90 × 2/42 × 2 = 180/84
  4. Subtract the two like fractions:
    63/84 - 180/84 = 63 - 180/84 = -117/84
  5. After reducing the fraction, the answer is -39/28

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