Answers

Add 24/21 and 42/81

1^st number: 1 3/21, 2^nd number: 42/81

24/21 + 42/81 is 314/189.

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,
   24/21 = 24 × 27/21 × 27 = 648/567
3. Likewise, for the 2nd fraction, since 81 × 7 = 567,
   42/81 = 42 × 7/81 × 7 = 294/567
4. Add the two like fractions:
   648/567 + 294/567 = 648 + 294/567 = 942/567
5. 942/567 simplified gives 314/189
6. So, 24/21 + 42/81 = 314/189
   In mixed form: 1125/189

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