Answers

Add 72/21 and 56/54

1^st number: 3 9/21, 2^nd number: 1 2/54

72/21 + 56/54 is 844/189.

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,
   72/21 = 72 × 18/21 × 18 = 1296/378
3. Likewise, for the 2nd fraction, since 54 × 7 = 378,
   56/54 = 56 × 7/54 × 7 = 392/378
4. Add the two like fractions:
   1296/378 + 392/378 = 1296 + 392/378 = 1688/378
5. 1688/378 simplified gives 844/189
6. So, 72/21 + 56/54 = 844/189
   In mixed form: 488/189

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