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Subtract 40/7 from 40/9

1st number: 4 4/9, 2nd number: 5 5/7

40/9 - 40/7 is -80/63.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 9 and 7 is 63
  2. For the 1st fraction, since 9 × 7 = 63,
    40/9 = 40 × 7/9 × 7 = 280/63
  3. Likewise, for the 2nd fraction, since 7 × 9 = 63,
    40/7 = 40 × 9/7 × 9 = 360/63
  4. Subtract the two fractions:
    280/63 - 360/63 = 280 - 360/63 = -80/63

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