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Subtract 35/27 from 42/21

1st number: 2 0/21, 2nd number: 1 8/27

42/21 - 35/27 is 19/27.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 21 and 27 is 189
  2. For the 1st fraction, since 21 × 9 = 189,
    42/21 = 42 × 9/21 × 9 = 378/189
  3. Likewise, for the 2nd fraction, since 27 × 7 = 189,
    35/27 = 35 × 7/27 × 7 = 245/189
  4. Subtract the two fractions:
    378/189 - 245/189 = 378 - 245/189 = 133/189
  5. After reducing the fraction, the answer is 19/27

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