Answers

Add 21/8 and 10/81

1^st number: 2 5/8, 2^nd number: 10/81

21/8 + 10/81 is 1781/648.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 8 and 81 is 648
   
   Next, find the equivalent fraction of both fractional numbers with denominator 648
2. For the 1st fraction, since 8 × 81 = 648,
   21/8 = 21 × 81/8 × 81 = 1701/648
3. Likewise, for the 2nd fraction, since 81 × 8 = 648,
   10/81 = 10 × 8/81 × 8 = 80/648
4. Add the two like fractions:
   1701/648 + 80/648 = 1701 + 80/648 = 1781/648
5. So, 21/8 + 10/81 = 1781/648
   In mixed form: 2485/648

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