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Subtract 8/9 from 42/80

42/80 - 8/9 is -131/360.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 80 and 9 is 720
  2. For the 1st fraction, since 80 × 9 = 720,
    42/80 = 42 × 9/80 × 9 = 378/720
  3. Likewise, for the 2nd fraction, since 9 × 80 = 720,
    8/9 = 8 × 80/9 × 80 = 640/720
  4. Subtract the two fractions:
    378/720 - 640/720 = 378 - 640/720 = -262/720
  5. After reducing the fraction, the answer is -131/360

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