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Subtract 90/70 from 1/27

1st number: 1/27, 2nd number: 1 20/70

1/27 - 90/70 is -236/189.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 27 and 70 is 1890

    Next, find the equivalent fraction of both fractional numbers with denominator 1890
  2. For the 1st fraction, since 27 × 70 = 1890,
    1/27 = 1 × 70/27 × 70 = 70/1890
  3. Likewise, for the 2nd fraction, since 70 × 27 = 1890,
    90/70 = 90 × 27/70 × 27 = 2430/1890
  4. Subtract the two like fractions:
    70/1890 - 2430/1890 = 70 - 2430/1890 = -2360/1890
  5. After reducing the fraction, the answer is -236/189

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