Answers

Subtract 63/7 from 15/42

1^st number: 15/42, 2^nd number: 9 0/7

15/42 - 63/7 is -121/14.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 42 and 7 is 42
   
   Next, find the equivalent fraction of both fractional numbers with denominator 42
2. For the 1st fraction, since 42 × 1 = 42,
   15/42 = 15 × 1/42 × 1 = 15/42
3. Likewise, for the 2nd fraction, since 7 × 6 = 42,
   63/7 = 63 × 6/7 × 6 = 378/42
4. Subtract the two like fractions:
   15/42 - 378/42 = 15 - 378/42 = -363/42
5. After reducing the fraction, the answer is -121/14

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