Answers

Add 21/56 and 84/54

1^st number: 21/56, 2^nd number: 1 30/54

21/56 + 84/54 is 139/72.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 56 and 54 is 1512
   
   Next, find the equivalent fraction of both fractional numbers with denominator 1512
2. For the 1st fraction, since 56 × 27 = 1512,
   21/56 = 21 × 27/56 × 27 = 567/1512
3. Likewise, for the 2nd fraction, since 54 × 28 = 1512,
   84/54 = 84 × 28/54 × 28 = 2352/1512
4. Add the two like fractions:
   567/1512 + 2352/1512 = 567 + 2352/1512 = 2919/1512
5. 2919/1512 simplified gives 139/72
6. So, 21/56 + 84/54 = 139/72
   In mixed form: 167/72

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