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Subtract 54/7 from 20/3

1st number: 6 2/3, 2nd number: 7 5/7

20/3 - 54/7 is -22/21.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 3 and 7 is 21
  2. For the 1st fraction, since 3 × 7 = 21,
    20/3 = 20 × 7/3 × 7 = 140/21
  3. Likewise, for the 2nd fraction, since 7 × 3 = 21,
    54/7 = 54 × 3/7 × 3 = 162/21
  4. Subtract the two fractions:
    140/21 - 162/21 = 140 - 162/21 = -22/21

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