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Subtract 42/40 from 18/98

1st number: 18/98, 2nd number: 1 2/40

18/98 - 42/40 is -849/980.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 98 and 40 is 1960
  2. For the 1st fraction, since 98 × 20 = 1960,
    18/98 = 18 × 20/98 × 20 = 360/1960
  3. Likewise, for the 2nd fraction, since 40 × 49 = 1960,
    42/40 = 42 × 49/40 × 49 = 2058/1960
  4. Subtract the two fractions:
    360/1960 - 2058/1960 = 360 - 2058/1960 = -1698/1960
  5. After reducing the fraction, the answer is -849/980

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