Answers

Add 72/18 and 63/84

1^st number: 4 0/18, 2^nd number: 63/84

72/18 + 63/84 is 19/4.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 18 and 84 is 252
   
   Next, find the equivalent fraction of both fractional numbers with denominator 252
2. For the 1st fraction, since 18 × 14 = 252,
   72/18 = 72 × 14/18 × 14 = 1008/252
3. Likewise, for the 2nd fraction, since 84 × 3 = 252,
   63/84 = 63 × 3/84 × 3 = 189/252
4. Add the two like fractions:
   1008/252 + 189/252 = 1008 + 189/252 = 1197/252
5. 1197/252 simplified gives 19/4
6. So, 72/18 + 63/84 = 19/4
   In mixed form: 43/4

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