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Subtract 81/14 from 20/45

1st number: 20/45, 2nd number: 5 11/14

20/45 - 81/14 is -673/126.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 45 and 14 is 630

    Next, find the equivalent fraction of both fractional numbers with denominator 630
  2. For the 1st fraction, since 45 × 14 = 630,
    20/45 = 20 × 14/45 × 14 = 280/630
  3. Likewise, for the 2nd fraction, since 14 × 45 = 630,
    81/14 = 81 × 45/14 × 45 = 3645/630
  4. Subtract the two like fractions:
    280/630 - 3645/630 = 280 - 3645/630 = -3365/630
  5. After reducing the fraction, the answer is -673/126

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