Answers

Add 4/21 and 81/12

1^st number: 4/21, 2^nd number: 6 9/12

4/21 + 81/12 is 583/84.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 21 and 12 is 84
   
   Next, find the equivalent fraction of both fractional numbers with denominator 84
2. For the 1st fraction, since 21 × 4 = 84,
   4/21 = 4 × 4/21 × 4 = 16/84
3. Likewise, for the 2nd fraction, since 12 × 7 = 84,
   81/12 = 81 × 7/12 × 7 = 567/84
4. Add the two like fractions:
   16/84 + 567/84 = 16 + 567/84 = 583/84
5. So, 4/21 + 81/12 = 583/84
   In mixed form: 679/84

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