Answers

Add 12/54 and 81/42

1^st number: 12/54, 2^nd number: 1 39/42

12/54 + 81/42 is 271/126.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 54 and 42 is 378
   
   Next, find the equivalent fraction of both fractional numbers with denominator 378
2. For the 1st fraction, since 54 × 7 = 378,
   12/54 = 12 × 7/54 × 7 = 84/378
3. Likewise, for the 2nd fraction, since 42 × 9 = 378,
   81/42 = 81 × 9/42 × 9 = 729/378
4. Add the two like fractions:
   84/378 + 729/378 = 84 + 729/378 = 813/378
5. 813/378 simplified gives 271/126
6. So, 12/54 + 81/42 = 271/126
   In mixed form: 219/126

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