Answers

Add 81/54 and 75/20

1^st number: 1 27/54, 2^nd number: 3 15/20

81/54 + 75/20 is 21/4.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 54 and 20 is 540
   
   Next, find the equivalent fraction of both fractional numbers with denominator 540
2. For the 1st fraction, since 54 × 10 = 540,
   81/54 = 81 × 10/54 × 10 = 810/540
3. Likewise, for the 2nd fraction, since 20 × 27 = 540,
   75/20 = 75 × 27/20 × 27 = 2025/540
4. Add the two like fractions:
   810/540 + 2025/540 = 810 + 2025/540 = 2835/540
5. 2835/540 simplified gives 21/4
6. So, 81/54 + 75/20 = 21/4
   In mixed form: 51/4

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