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Subtract 7/8 from 3/90

3/90 - 7/8 is -101/120.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 90 and 8 is 360

    Next, find the equivalent fraction of both fractional numbers with denominator 360
  2. For the 1st fraction, since 90 × 4 = 360,
    3/90 = 3 × 4/90 × 4 = 12/360
  3. Likewise, for the 2nd fraction, since 8 × 45 = 360,
    7/8 = 7 × 45/8 × 45 = 315/360
  4. Subtract the two like fractions:
    12/360 - 315/360 = 12 - 315/360 = -303/360
  5. After reducing the fraction, the answer is -101/120

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