Answers

Add 81/4 and 45/72

1^st number: 20 1/4, 2^nd number: 45/72

81/4 + 45/72 is 167/8.

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,
   81/4 = 81 × 18/4 × 18 = 1458/72
3. Likewise, for the 2nd fraction, since 72 × 1 = 72,
   45/72 = 45 × 1/72 × 1 = 45/72
4. Add the two like fractions:
   1458/72 + 45/72 = 1458 + 45/72 = 1503/72
5. 1503/72 simplified gives 167/8
6. So, 81/4 + 45/72 = 167/8
   In mixed form: 207/8

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