Answers

Add 42/21 and 49/54

1^st number: 2 0/21, 2^nd number: 49/54

42/21 + 49/54 is 157/54.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 21 and 54 is 378
   
   Next, find the equivalent fraction of both fractional numbers with denominator 378
2. For the 1st fraction, since 21 × 18 = 378,
   42/21 = 42 × 18/21 × 18 = 756/378
3. Likewise, for the 2nd fraction, since 54 × 7 = 378,
   49/54 = 49 × 7/54 × 7 = 343/378
4. Add the two like fractions:
   756/378 + 343/378 = 756 + 343/378 = 1099/378
5. 1099/378 simplified gives 157/54
6. So, 42/21 + 49/54 = 157/54
   In mixed form: 249/54

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