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Subtract 70/7 from 20/8

1st number: 2 4/8, 2nd number: 10 0/7

20/8 - 70/7 is -15/2.

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,
    20/8 = 20 × 7/8 × 7 = 140/56
  3. Likewise, for the 2nd fraction, since 7 × 8 = 56,
    70/7 = 70 × 8/7 × 8 = 560/56
  4. Subtract the two fractions:
    140/56 - 560/56 = 140 - 560/56 = -420/56
  5. After reducing the fraction, the answer is -15/2

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