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Subtract 90/98 from 27/80

27/80 - 90/98 is -2277/3920.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 80 and 98 is 3920
  2. For the 1st fraction, since 80 × 49 = 3920,
    27/80 = 27 × 49/80 × 49 = 1323/3920
  3. Likewise, for the 2nd fraction, since 98 × 40 = 3920,
    90/98 = 90 × 40/98 × 40 = 3600/3920
  4. Subtract the two fractions:
    1323/3920 - 3600/3920 = 1323 - 3600/3920 = -2277/3920

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