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Subtract 21/40 from 49/84

49/84 - 21/40 is 7/120.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 84 and 40 is 840
  2. For the 1st fraction, since 84 × 10 = 840,
    49/84 = 49 × 10/84 × 10 = 490/840
  3. Likewise, for the 2nd fraction, since 40 × 21 = 840,
    21/40 = 21 × 21/40 × 21 = 441/840
  4. Subtract the two fractions:
    490/840 - 441/840 = 490 - 441/840 = 49/840
  5. After reducing the fraction, the answer is 7/120

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