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Subtract 2/21 from 28/27

1st number: 1 1/27, 2nd number: 2/21

28/27 - 2/21 is 178/189.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 27 and 21 is 189

    Next, find the equivalent fraction of both fractional numbers with denominator 189
  2. For the 1st fraction, since 27 × 7 = 189,
    28/27 = 28 × 7/27 × 7 = 196/189
  3. Likewise, for the 2nd fraction, since 21 × 9 = 189,
    2/21 = 2 × 9/21 × 9 = 18/189
  4. Subtract the two like fractions:
    196/189 - 18/189 = 196 - 18/189 = 178/189

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