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Subtract 84/40 from 12/18

1st number: 12/18, 2nd number: 2 4/40

12/18 - 84/40 is -43/30.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 18 and 40 is 360
  2. For the 1st fraction, since 18 × 20 = 360,
    12/18 = 12 × 20/18 × 20 = 240/360
  3. Likewise, for the 2nd fraction, since 40 × 9 = 360,
    84/40 = 84 × 9/40 × 9 = 756/360
  4. Subtract the two fractions:
    240/360 - 756/360 = 240 - 756/360 = -516/360
  5. After reducing the fraction, the answer is -43/30

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