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Subtract 18/7 from 27/40

1st number: 27/40, 2nd number: 2 4/7

27/40 - 18/7 is -531/280.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 40 and 7 is 280
  2. For the 1st fraction, since 40 × 7 = 280,
    27/40 = 27 × 7/40 × 7 = 189/280
  3. Likewise, for the 2nd fraction, since 7 × 40 = 280,
    18/7 = 18 × 40/7 × 40 = 720/280
  4. Subtract the two fractions:
    189/280 - 720/280 = 189 - 720/280 = -531/280

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