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Subtract 70/8 from 15/7

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

15/7 - 70/8 is -185/28.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 7 and 8 is 56

    Next, find the equivalent fraction of both fractional numbers with denominator 56
  2. For the 1st fraction, since 7 × 8 = 56,
    15/7 = 15 × 8/7 × 8 = 120/56
  3. Likewise, for the 2nd fraction, since 8 × 7 = 56,
    70/8 = 70 × 7/8 × 7 = 490/56
  4. Subtract the two like fractions:
    120/56 - 490/56 = 120 - 490/56 = -370/56
  5. After reducing the fraction, the answer is -185/28

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