Answers

Subtract 42/12 from 42/63

1^st number: 42/63, 2^nd number: 3 6/12

42/63 - 42/12 is -17/6.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 63 and 12 is 252
   
   Next, find the equivalent fraction of both fractional numbers with denominator 252
2. For the 1st fraction, since 63 × 4 = 252,
   42/63 = 42 × 4/63 × 4 = 168/252
3. Likewise, for the 2nd fraction, since 12 × 21 = 252,
   42/12 = 42 × 21/12 × 21 = 882/252
4. Subtract the two like fractions:
   168/252 - 882/252 = 168 - 882/252 = -714/252
5. After reducing the fraction, the answer is -17/6

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