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Subtract 42/40 from 49/84

1st number: 49/84, 2nd number: 1 2/40

49/84 - 42/40 is -7/15.

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,
    42/40 = 42 × 21/40 × 21 = 882/840
  4. Subtract the two fractions:
    490/840 - 882/840 = 490 - 882/840 = -392/840
  5. After reducing the fraction, the answer is -7/15

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