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Subtract 45/42 from 63/84

1st number: 63/84, 2nd number: 1 3/42

63/84 - 45/42 is -9/28.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 84 and 42 is 84
  2. For the 1st fraction, since 84 × 1 = 84,
    63/84 = 63 × 1/84 × 1 = 63/84
  3. Likewise, for the 2nd fraction, since 42 × 2 = 84,
    45/42 = 45 × 2/42 × 2 = 90/84
  4. Subtract the two fractions:
    63/84 - 90/84 = 63 - 90/84 = -27/84
  5. After reducing the fraction, the answer is -9/28

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