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Subtract 9/42 from 27/70

27/70 - 9/42 is 6/35.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 70 and 42 is 210

    Next, find the equivalent fraction of both fractional numbers with denominator 210
  2. For the 1st fraction, since 70 × 3 = 210,
    27/70 = 27 × 3/70 × 3 = 81/210
  3. Likewise, for the 2nd fraction, since 42 × 5 = 210,
    9/42 = 9 × 5/42 × 5 = 45/210
  4. Subtract the two like fractions:
    81/210 - 45/210 = 81 - 45/210 = 36/210
  5. After reducing the fraction, the answer is 6/35

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