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Subtract 81/80 from 50/84

1st number: 50/84, 2nd number: 1 1/80

50/84 - 81/80 is -701/1680.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 84 and 80 is 1680
  2. For the 1st fraction, since 84 × 20 = 1680,
    50/84 = 50 × 20/84 × 20 = 1000/1680
  3. Likewise, for the 2nd fraction, since 80 × 21 = 1680,
    81/80 = 81 × 21/80 × 21 = 1701/1680
  4. Subtract the two fractions:
    1000/1680 - 1701/1680 = 1000 - 1701/1680 = -701/1680

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