Answers

Subtract 10/63 from 81/42

1^st number: 1 39/42, 2^nd number: 10/63

81/42 - 10/63 is 223/126.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 42 and 63 is 126
   
   Next, find the equivalent fraction of both fractional numbers with denominator 126
2. For the 1st fraction, since 42 × 3 = 126,
   81/42 = 81 × 3/42 × 3 = 243/126
3. Likewise, for the 2nd fraction, since 63 × 2 = 126,
   10/63 = 10 × 2/63 × 2 = 20/126
4. Subtract the two like fractions:
   243/126 - 20/126 = 243 - 20/126 = 223/126
5. In mixed form: 197/126

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