Answers

Add 81/9 and 3/21

1^st number: 9 0/9, 2^nd number: 3/21

81/9 + 3/21 is 64/7.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 9 and 21 is 63
   
   Next, find the equivalent fraction of both fractional numbers with denominator 63
2. For the 1st fraction, since 9 × 7 = 63,
   81/9 = 81 × 7/9 × 7 = 567/63
3. Likewise, for the 2nd fraction, since 21 × 3 = 63,
   3/21 = 3 × 3/21 × 3 = 9/63
4. Add the two like fractions:
   567/63 + 9/63 = 567 + 9/63 = 576/63
5. 576/63 simplified gives 64/7
6. So, 81/9 + 3/21 = 64/7
   In mixed form: 91/7

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