Answers

Add 25/20 and 63/81

1^st number: 1 5/20, 2^nd number: 63/81

25/20 + 63/81 is 73/36.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 20 and 81 is 1620
   
   Next, find the equivalent fraction of both fractional numbers with denominator 1620
2. For the 1st fraction, since 20 × 81 = 1620,
   25/20 = 25 × 81/20 × 81 = 2025/1620
3. Likewise, for the 2nd fraction, since 81 × 20 = 1620,
   63/81 = 63 × 20/81 × 20 = 1260/1620
4. Add the two like fractions:
   2025/1620 + 1260/1620 = 2025 + 1260/1620 = 3285/1620
5. 3285/1620 simplified gives 73/36
6. So, 25/20 + 63/81 = 73/36
   In mixed form: 21/36

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