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Subtract 20/7 from 15/20

1st number: 15/20, 2nd number: 2 6/7

15/20 - 20/7 is -59/28.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 20 and 7 is 140
  2. For the 1st fraction, since 20 × 7 = 140,
    15/20 = 15 × 7/20 × 7 = 105/140
  3. Likewise, for the 2nd fraction, since 7 × 20 = 140,
    20/7 = 20 × 20/7 × 20 = 400/140
  4. Subtract the two fractions:
    105/140 - 400/140 = 105 - 400/140 = -295/140
  5. After reducing the fraction, the answer is -59/28

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