Answers

Add 21/2 and 4/81

1^st number: 10 1/2, 2^nd number: 4/81

21/2 + 4/81 is 1709/162.

Steps for adding 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,
   21/2 = 21 × 81/2 × 81 = 1701/162
3. Likewise, for the 2nd fraction, since 81 × 2 = 162,
   4/81 = 4 × 2/81 × 2 = 8/162
4. Add the two like fractions:
   1701/162 + 8/162 = 1701 + 8/162 = 1709/162
5. So, 21/2 + 4/81 = 1709/162
   In mixed form: 1089/162

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