Answers

Add 54/27 and 15/84

1^st number: 2 0/27, 2^nd number: 15/84

54/27 + 15/84 is 61/28.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 27 and 84 is 756
   
   Next, find the equivalent fraction of both fractional numbers with denominator 756
2. For the 1st fraction, since 27 × 28 = 756,
   54/27 = 54 × 28/27 × 28 = 1512/756
3. Likewise, for the 2nd fraction, since 84 × 9 = 756,
   15/84 = 15 × 9/84 × 9 = 135/756
4. Add the two like fractions:
   1512/756 + 135/756 = 1512 + 135/756 = 1647/756
5. 1647/756 simplified gives 61/28
6. So, 54/27 + 15/84 = 61/28
   In mixed form: 25/28

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