Answers

Add 81/63 and 21/49

1^st number: 1 18/63, 2^nd number: 21/49

81/63 + 21/49 is 12/7.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 63 and 49 is 441
   
   Next, find the equivalent fraction of both fractional numbers with denominator 441
2. For the 1st fraction, since 63 × 7 = 441,
   81/63 = 81 × 7/63 × 7 = 567/441
3. Likewise, for the 2nd fraction, since 49 × 9 = 441,
   21/49 = 21 × 9/49 × 9 = 189/441
4. Add the two like fractions:
   567/441 + 189/441 = 567 + 189/441 = 756/441
5. 756/441 simplified gives 12/7
6. So, 81/63 + 21/49 = 12/7
   In mixed form: 15/7

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