Answers

Add 56/21 and 7/81

1^st number: 2 14/21, 2^nd number: 7/81

56/21 + 7/81 is 223/81.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 21 and 81 is 567
   
   Next, find the equivalent fraction of both fractional numbers with denominator 567
2. For the 1st fraction, since 21 × 27 = 567,
   56/21 = 56 × 27/21 × 27 = 1512/567
3. Likewise, for the 2nd fraction, since 81 × 7 = 567,
   7/81 = 7 × 7/81 × 7 = 49/567
4. Add the two like fractions:
   1512/567 + 49/567 = 1512 + 49/567 = 1561/567
5. 1561/567 simplified gives 223/81
6. So, 56/21 + 7/81 = 223/81
   In mixed form: 261/81

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