Answers

Subtract 63/8 from 75/21

1^st number: 3 12/21, 2^nd number: 7 7/8

75/21 - 63/8 is -241/56.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 21 and 8 is 168
   
   Next, find the equivalent fraction of both fractional numbers with denominator 168
2. For the 1st fraction, since 21 × 8 = 168,
   75/21 = 75 × 8/21 × 8 = 600/168
3. Likewise, for the 2nd fraction, since 8 × 21 = 168,
   63/8 = 63 × 21/8 × 21 = 1323/168
4. Subtract the two like fractions:
   600/168 - 1323/168 = 600 - 1323/168 = -723/168
5. After reducing the fraction, the answer is -241/56

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