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Subtract 18/70 from 27/72

27/72 - 18/70 is 33/280.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 72 and 70 is 2520
  2. For the 1st fraction, since 72 × 35 = 2520,
    27/72 = 27 × 35/72 × 35 = 945/2520
  3. Likewise, for the 2nd fraction, since 70 × 36 = 2520,
    18/70 = 18 × 36/70 × 36 = 648/2520
  4. Subtract the two fractions:
    945/2520 - 648/2520 = 945 - 648/2520 = 297/2520
  5. After reducing the fraction, the answer is 33/280

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