Answers

Add 21/84 and 72/27

1^st number: 21/84, 2^nd number: 2 18/27

21/84 + 72/27 is 35/12.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 84 and 27 is 756
   
   Next, find the equivalent fraction of both fractional numbers with denominator 756
2. For the 1st fraction, since 84 × 9 = 756,
   21/84 = 21 × 9/84 × 9 = 189/756
3. Likewise, for the 2nd fraction, since 27 × 28 = 756,
   72/27 = 72 × 28/27 × 28 = 2016/756
4. Add the two like fractions:
   189/756 + 2016/756 = 189 + 2016/756 = 2205/756
5. 2205/756 simplified gives 35/12
6. So, 21/84 + 72/27 = 35/12
   In mixed form: 211/12

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