Answers

Add 9/42 and 81/54

1^st number: 9/42, 2^nd number: 1 27/54

9/42 + 81/54 is 12/7.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 42 and 54 is 378
   
   Next, find the equivalent fraction of both fractional numbers with denominator 378
2. For the 1st fraction, since 42 × 9 = 378,
   9/42 = 9 × 9/42 × 9 = 81/378
3. Likewise, for the 2nd fraction, since 54 × 7 = 378,
   81/54 = 81 × 7/54 × 7 = 567/378
4. Add the two like fractions:
   81/378 + 567/378 = 81 + 567/378 = 648/378
5. 648/378 simplified gives 12/7
6. So, 9/42 + 81/54 = 12/7
   In mixed form: 15/7

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