Answers

Add 81/4 and 45/18

1^st number: 20 1/4, 2^nd number: 2 9/18

81/4 + 45/18 is 91/4.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 4 and 18 is 36
   
   Next, find the equivalent fraction of both fractional numbers with denominator 36
2. For the 1st fraction, since 4 × 9 = 36,
   81/4 = 81 × 9/4 × 9 = 729/36
3. Likewise, for the 2nd fraction, since 18 × 2 = 36,
   45/18 = 45 × 2/18 × 2 = 90/36
4. Add the two like fractions:
   729/36 + 90/36 = 729 + 90/36 = 819/36
5. 819/36 simplified gives 91/4
6. So, 81/4 + 45/18 = 91/4
   In mixed form: 223/4

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