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Subtract 63/4 from 15/42

1st number: 15/42, 2nd number: 15 3/4

15/42 - 63/4 is -431/28.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 42 and 4 is 84
  2. For the 1st fraction, since 42 × 2 = 84,
    15/42 = 15 × 2/42 × 2 = 30/84
  3. Likewise, for the 2nd fraction, since 4 × 21 = 84,
    63/4 = 63 × 21/4 × 21 = 1323/84
  4. Subtract the two fractions:
    30/84 - 1323/84 = 30 - 1323/84 = -1293/84
  5. After reducing the fraction, the answer is -431/28

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