Answers

Add 21/16 and 30/81

1^st number: 1 5/16, 2^nd number: 30/81

21/16 + 30/81 is 727/432.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 16 and 81 is 1296
   
   Next, find the equivalent fraction of both fractional numbers with denominator 1296
2. For the 1st fraction, since 16 × 81 = 1296,
   21/16 = 21 × 81/16 × 81 = 1701/1296
3. Likewise, for the 2nd fraction, since 81 × 16 = 1296,
   30/81 = 30 × 16/81 × 16 = 480/1296
4. Add the two like fractions:
   1701/1296 + 480/1296 = 1701 + 480/1296 = 2181/1296
5. 2181/1296 simplified gives 727/432
6. So, 21/16 + 30/81 = 727/432
   In mixed form: 1295/432

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