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Subtract 8/10 from 5/7

5/7 - 8/10 is -3/35.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 7 and 10 is 70

    Next, find the equivalent fraction of both fractional numbers with denominator 70
  2. For the 1st fraction, since 7 × 10 = 70,
    5/7 = 5 × 10/7 × 10 = 50/70
  3. Likewise, for the 2nd fraction, since 10 × 7 = 70,
    8/10 = 8 × 7/10 × 7 = 56/70
  4. Subtract the two like fractions:
    50/70 - 56/70 = 50 - 56/70 = -6/70
  5. After reducing the fraction, the answer is -3/35

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