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Subtract 30/8 from 1/90

1st number: 1/90, 2nd number: 3 6/8

1/90 - 30/8 is -673/180.

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,
    1/90 = 1 × 4/90 × 4 = 4/360
  3. Likewise, for the 2nd fraction, since 8 × 45 = 360,
    30/8 = 30 × 45/8 × 45 = 1350/360
  4. Subtract the two like fractions:
    4/360 - 1350/360 = 4 - 1350/360 = -1346/360
  5. After reducing the fraction, the answer is -673/180

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