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Subtract 5/56 from 20/42

20/42 - 5/56 is 65/168.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 42 and 56 is 168
  2. For the 1st fraction, since 42 × 4 = 168,
    20/42 = 20 × 4/42 × 4 = 80/168
  3. Likewise, for the 2nd fraction, since 56 × 3 = 168,
    5/56 = 5 × 3/56 × 3 = 15/168
  4. Subtract the two fractions:
    80/168 - 15/168 = 80 - 15/168 = 65/168

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