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Subtract 20/7 from 10/8

1st number: 1 2/8, 2nd number: 2 6/7

10/8 - 20/7 is -45/28.

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,
    10/8 = 10 × 7/8 × 7 = 70/56
  3. Likewise, for the 2nd fraction, since 7 × 8 = 56,
    20/7 = 20 × 8/7 × 8 = 160/56
  4. Subtract the two fractions:
    70/56 - 160/56 = 70 - 160/56 = -90/56
  5. After reducing the fraction, the answer is -45/28

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