Answers

Add 81/72 and 63/4

1^st number: 1 9/72, 2^nd number: 15 3/4

81/72 + 63/4 is 135/8.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 72 and 4 is 72
   
   Next, find the equivalent fraction of both fractional numbers with denominator 72
2. For the 1st fraction, since 72 × 1 = 72,
   81/72 = 81 × 1/72 × 1 = 81/72
3. Likewise, for the 2nd fraction, since 4 × 18 = 72,
   63/4 = 63 × 18/4 × 18 = 1134/72
4. Add the two like fractions:
   81/72 + 1134/72 = 81 + 1134/72 = 1215/72
5. 1215/72 simplified gives 135/8
6. So, 81/72 + 63/4 = 135/8
   In mixed form: 167/8

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