Answers

Subtract 63/4 from 42/8

1^st number: 5 2/8, 2^nd number: 15 3/4

42/8 - 63/4 is -21/2.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 8 and 4 is 8
   
   Next, find the equivalent fraction of both fractional numbers with denominator 8
2. For the 1st fraction, since 8 × 1 = 8,
   42/8 = 42 × 1/8 × 1 = 42/8
3. Likewise, for the 2nd fraction, since 4 × 2 = 8,
   63/4 = 63 × 2/4 × 2 = 126/8
4. Subtract the two like fractions:
   42/8 - 126/8 = 42 - 126/8 = -84/8
5. After reducing the fraction, the answer is -21/2

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