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Subtract 21/27 from 1/70

1/70 - 21/27 is -481/630.

Steps for subtracting fractions

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

    Next, find the equivalent fraction of both fractional numbers with denominator 1890
  2. For the 1st fraction, since 70 × 27 = 1890,
    1/70 = 1 × 27/70 × 27 = 27/1890
  3. Likewise, for the 2nd fraction, since 27 × 70 = 1890,
    21/27 = 21 × 70/27 × 70 = 1470/1890
  4. Subtract the two like fractions:
    27/1890 - 1470/1890 = 27 - 1470/1890 = -1443/1890
  5. After reducing the fraction, the answer is -481/630

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