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Subtract 8/21 from 1/80

1/80 - 8/21 is -619/1680.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 80 and 21 is 1680

    Next, find the equivalent fraction of both fractional numbers with denominator 1680
  2. For the 1st fraction, since 80 × 21 = 1680,
    1/80 = 1 × 21/80 × 21 = 21/1680
  3. Likewise, for the 2nd fraction, since 21 × 80 = 1680,
    8/21 = 8 × 80/21 × 80 = 640/1680
  4. Subtract the two like fractions:
    21/1680 - 640/1680 = 21 - 640/1680 = -619/1680

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