Answers

Add 36/84 and 21/12

1^st number: 36/84, 2^nd number: 1 9/12

36/84 + 21/12 is 61/28.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 84 and 12 is 84
   
   Next, find the equivalent fraction of both fractional numbers with denominator 84
2. For the 1st fraction, since 84 × 1 = 84,
   36/84 = 36 × 1/84 × 1 = 36/84
3. Likewise, for the 2nd fraction, since 12 × 7 = 84,
   21/12 = 21 × 7/12 × 7 = 147/84
4. Add the two like fractions:
   36/84 + 147/84 = 36 + 147/84 = 183/84
5. 183/84 simplified gives 61/28
6. So, 36/84 + 21/12 = 61/28
   In mixed form: 25/28

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