Answers

Add 15/3 and 20/81

1^st number: 5 0/3, 2^nd number: 20/81

15/3 + 20/81 is 425/81.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 3 and 81 is 81
   
   Next, find the equivalent fraction of both fractional numbers with denominator 81
2. For the 1st fraction, since 3 × 27 = 81,
   15/3 = 15 × 27/3 × 27 = 405/81
3. Likewise, for the 2nd fraction, since 81 × 1 = 81,
   20/81 = 20 × 1/81 × 1 = 20/81
4. Add the two like fractions:
   405/81 + 20/81 = 405 + 20/81 = 425/81
5. So, 15/3 + 20/81 = 425/81
   In mixed form: 520/81

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