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Subtract 98/80 from 8/42

1st number: 8/42, 2nd number: 1 18/80

8/42 - 98/80 is -869/840.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 42 and 80 is 1680
  2. For the 1st fraction, since 42 × 40 = 1680,
    8/42 = 8 × 40/42 × 40 = 320/1680
  3. Likewise, for the 2nd fraction, since 80 × 21 = 1680,
    98/80 = 98 × 21/80 × 21 = 2058/1680
  4. Subtract the two fractions:
    320/1680 - 2058/1680 = 320 - 2058/1680 = -1738/1680
  5. After reducing the fraction, the answer is -869/840

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