Answers

Add 45/4 and 81/72

1^st number: 11 1/4, 2^nd number: 1 9/72

45/4 + 81/72 is 99/8.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 4 and 72 is 72
   
   Next, find the equivalent fraction of both fractional numbers with denominator 72
2. For the 1st fraction, since 4 × 18 = 72,
   45/4 = 45 × 18/4 × 18 = 810/72
3. Likewise, for the 2nd fraction, since 72 × 1 = 72,
   81/72 = 81 × 1/72 × 1 = 81/72
4. Add the two like fractions:
   810/72 + 81/72 = 810 + 81/72 = 891/72
5. 891/72 simplified gives 99/8
6. So, 45/4 + 81/72 = 99/8
   In mixed form: 123/8

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