Answers

Subtract 9/12 from 63/42

1^st number: 1 21/42, 2^nd number: 9/12

63/42 - 9/12 is 3/4.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 42 and 12 is 84
   
   Next, find the equivalent fraction of both fractional numbers with denominator 84
2. For the 1st fraction, since 42 × 2 = 84,
   63/42 = 63 × 2/42 × 2 = 126/84
3. Likewise, for the 2nd fraction, since 12 × 7 = 84,
   9/12 = 9 × 7/12 × 7 = 63/84
4. Subtract the two like fractions:
   126/84 - 63/84 = 126 - 63/84 = 63/84
5. After reducing the fraction, the answer is 3/4

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