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Subtract 21/25 from 1/21

1/21 - 21/25 is -416/525.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 21 and 25 is 525

    Next, find the equivalent fraction of both fractional numbers with denominator 525
  2. For the 1st fraction, since 21 × 25 = 525,
    1/21 = 1 × 25/21 × 25 = 25/525
  3. Likewise, for the 2nd fraction, since 25 × 21 = 525,
    21/25 = 21 × 21/25 × 21 = 441/525
  4. Subtract the two like fractions:
    25/525 - 441/525 = 25 - 441/525 = -416/525

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