Answers

Subtract 7/81 from 63/2

1^st number: 31 1/2, 2^nd number: 7/81

63/2 - 7/81 is 5089/162.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 2 and 81 is 162
   
   Next, find the equivalent fraction of both fractional numbers with denominator 162
2. For the 1st fraction, since 2 × 81 = 162,
   63/2 = 63 × 81/2 × 81 = 5103/162
3. Likewise, for the 2nd fraction, since 81 × 2 = 162,
   7/81 = 7 × 2/81 × 2 = 14/162
4. Subtract the two like fractions:
   5103/162 - 14/162 = 5103 - 14/162 = 5089/162
5. In mixed form: 3167/162

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