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Subtract 18/49 from 9/56

9/56 - 18/49 is -81/392.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 56 and 49 is 392
  2. For the 1st fraction, since 56 × 7 = 392,
    9/56 = 9 × 7/56 × 7 = 63/392
  3. Likewise, for the 2nd fraction, since 49 × 8 = 392,
    18/49 = 18 × 8/49 × 8 = 144/392
  4. Subtract the two fractions:
    63/392 - 144/392 = 63 - 144/392 = -81/392

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