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Subtract 10/21 from 1/45

1/45 - 10/21 is -143/315.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 45 and 21 is 315

    Next, find the equivalent fraction of both fractional numbers with denominator 315
  2. For the 1st fraction, since 45 × 7 = 315,
    1/45 = 1 × 7/45 × 7 = 7/315
  3. Likewise, for the 2nd fraction, since 21 × 15 = 315,
    10/21 = 10 × 15/21 × 15 = 150/315
  4. Subtract the two like fractions:
    7/315 - 150/315 = 7 - 150/315 = -143/315

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