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Subtract 12/40 from 9/49

9/49 - 12/40 is -57/490.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 49 and 40 is 1960

    Next, find the equivalent fraction of both fractional numbers with denominator 1960
  2. For the 1st fraction, since 49 × 40 = 1960,
    9/49 = 9 × 40/49 × 40 = 360/1960
  3. Likewise, for the 2nd fraction, since 40 × 49 = 1960,
    12/40 = 12 × 49/40 × 49 = 588/1960
  4. Subtract the two like fractions:
    360/1960 - 588/1960 = 360 - 588/1960 = -228/1960
  5. After reducing the fraction, the answer is -57/490

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