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Subtract 32/21 from 1/20

1st number: 1/20, 2nd number: 1 11/21

1/20 - 32/21 is -619/420.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 20 and 21 is 420

    Next, find the equivalent fraction of both fractional numbers with denominator 420
  2. For the 1st fraction, since 20 × 21 = 420,
    1/20 = 1 × 21/20 × 21 = 21/420
  3. Likewise, for the 2nd fraction, since 21 × 20 = 420,
    32/21 = 32 × 20/21 × 20 = 640/420
  4. Subtract the two like fractions:
    21/420 - 640/420 = 21 - 640/420 = -619/420

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