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Subtract 40/7 from 15/8

1st number: 1 7/8, 2nd number: 5 5/7

15/8 - 40/7 is -215/56.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 8 and 7 is 56
  2. For the 1st fraction, since 8 × 7 = 56,
    15/8 = 15 × 7/8 × 7 = 105/56
  3. Likewise, for the 2nd fraction, since 7 × 8 = 56,
    40/7 = 40 × 8/7 × 8 = 320/56
  4. Subtract the two fractions:
    105/56 - 320/56 = 105 - 320/56 = -215/56

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