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Subtract 84/12 from 1/90

1st number: 1/90, 2nd number: 7 0/12

1/90 - 84/12 is -629/90.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 90 and 12 is 180

    Next, find the equivalent fraction of both fractional numbers with denominator 180
  2. For the 1st fraction, since 90 × 2 = 180,
    1/90 = 1 × 2/90 × 2 = 2/180
  3. Likewise, for the 2nd fraction, since 12 × 15 = 180,
    84/12 = 84 × 15/12 × 15 = 1260/180
  4. Subtract the two like fractions:
    2/180 - 1260/180 = 2 - 1260/180 = -1258/180
  5. After reducing the fraction, the answer is -629/90

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