Answers

Subtract 63/4 from 75/21

1^st number: 3 12/21, 2^nd number: 15 3/4

75/21 - 63/4 is -341/28.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 21 and 4 is 84
   
   Next, find the equivalent fraction of both fractional numbers with denominator 84
2. For the 1st fraction, since 21 × 4 = 84,
   75/21 = 75 × 4/21 × 4 = 300/84
3. Likewise, for the 2nd fraction, since 4 × 21 = 84,
   63/4 = 63 × 21/4 × 21 = 1323/84
4. Subtract the two like fractions:
   300/84 - 1323/84 = 300 - 1323/84 = -1023/84
5. After reducing the fraction, the answer is -341/28

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