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Subtract 3/7 from 5/20

5/20 - 3/7 is -5/28.

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,
    5/20 = 5 × 7/20 × 7 = 35/140
  3. Likewise, for the 2nd fraction, since 7 × 20 = 140,
    3/7 = 3 × 20/7 × 20 = 60/140
  4. Subtract the two fractions:
    35/140 - 60/140 = 35 - 60/140 = -25/140
  5. After reducing the fraction, the answer is -5/28

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