Answers

Add 81/15 and 21/98

1^st number: 5 6/15, 2^nd number: 21/98

81/15 + 21/98 is 393/70.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 15 and 98 is 1470
   
   Next, find the equivalent fraction of both fractional numbers with denominator 1470
2. For the 1st fraction, since 15 × 98 = 1470,
   81/15 = 81 × 98/15 × 98 = 7938/1470
3. Likewise, for the 2nd fraction, since 98 × 15 = 1470,
   21/98 = 21 × 15/98 × 15 = 315/1470
4. Add the two like fractions:
   7938/1470 + 315/1470 = 7938 + 315/1470 = 8253/1470
5. 8253/1470 simplified gives 393/70
6. So, 81/15 + 21/98 = 393/70
   In mixed form: 543/70

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