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Subtract 12/4 from 1/90

1st number: 1/90, 2nd number: 3 0/4

1/90 - 12/4 is -269/90.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 90 and 4 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 4 × 45 = 180,
    12/4 = 12 × 45/4 × 45 = 540/180
  4. Subtract the two like fractions:
    2/180 - 540/180 = 2 - 540/180 = -538/180
  5. After reducing the fraction, the answer is -269/90

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