Answers

Add 75/10 and 15/81

1^st number: 7 5/10, 2^nd number: 15/81

75/10 + 15/81 is 415/54.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 10 and 81 is 810
   
   Next, find the equivalent fraction of both fractional numbers with denominator 810
2. For the 1st fraction, since 10 × 81 = 810,
   75/10 = 75 × 81/10 × 81 = 6075/810
3. Likewise, for the 2nd fraction, since 81 × 10 = 810,
   15/81 = 15 × 10/81 × 10 = 150/810
4. Add the two like fractions:
   6075/810 + 150/810 = 6075 + 150/810 = 6225/810
5. 6225/810 simplified gives 415/54
6. So, 75/10 + 15/81 = 415/54
   In mixed form: 737/54

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