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Subtract 63/4 from 30/42

1st number: 30/42, 2nd number: 15 3/4

30/42 - 63/4 is -421/28.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 42 and 4 is 84

    Next, find the equivalent fraction of both fractional numbers with denominator 84
  2. For the 1st fraction, since 42 × 2 = 84,
    30/42 = 30 × 2/42 × 2 = 60/84
  3. Likewise, for the 2nd fraction, since 4 × 21 = 84,
    63/4 = 63 × 21/4 × 21 = 1323/84
  4. Subtract the two like fractions:
    60/84 - 1323/84 = 60 - 1323/84 = -1263/84
  5. After reducing the fraction, the answer is -421/28

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