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Subtract 30/12 from 90/84

1st number: 1 6/84, 2nd number: 2 6/12

90/84 - 30/12 is -10/7.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 84 and 12 is 84

    Next, find the equivalent fraction of both fractional numbers with denominator 84
  2. For the 1st fraction, since 84 × 1 = 84,
    90/84 = 90 × 1/84 × 1 = 90/84
  3. Likewise, for the 2nd fraction, since 12 × 7 = 84,
    30/12 = 30 × 7/12 × 7 = 210/84
  4. Subtract the two like fractions:
    90/84 - 210/84 = 90 - 210/84 = -120/84
  5. After reducing the fraction, the answer is -10/7

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