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Subtract 21/56 from 3/10

3/10 - 21/56 is -3/40.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 10 and 56 is 280
  2. For the 1st fraction, since 10 × 28 = 280,
    3/10 = 3 × 28/10 × 28 = 84/280
  3. Likewise, for the 2nd fraction, since 56 × 5 = 280,
    21/56 = 21 × 5/56 × 5 = 105/280
  4. Subtract the two fractions:
    84/280 - 105/280 = 84 - 105/280 = -21/280
  5. After reducing the fraction, the answer is -3/40

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