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Subtract 20/7 from 25/8

1st number: 3 1/8, 2nd number: 2 6/7

25/8 - 20/7 is 15/56.

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,
    25/8 = 25 × 7/8 × 7 = 175/56
  3. Likewise, for the 2nd fraction, since 7 × 8 = 56,
    20/7 = 20 × 8/7 × 8 = 160/56
  4. Subtract the two fractions:
    175/56 - 160/56 = 175 - 160/56 = 15/56

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