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Subtract 3/56 from 21/20

1st number: 1 1/20, 2nd number: 3/56

21/20 - 3/56 is 279/280.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 20 and 56 is 280
  2. For the 1st fraction, since 20 × 14 = 280,
    21/20 = 21 × 14/20 × 14 = 294/280
  3. Likewise, for the 2nd fraction, since 56 × 5 = 280,
    3/56 = 3 × 5/56 × 5 = 15/280
  4. Subtract the two fractions:
    294/280 - 15/280 = 294 - 15/280 = 279/280

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