Answers

Add 70/81 and 63/20

1^st number: 70/81, 2^nd number: 3 3/20

70/81 + 63/20 is 6503/1620.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 81 and 20 is 1620
   
   Next, find the equivalent fraction of both fractional numbers with denominator 1620
2. For the 1st fraction, since 81 × 20 = 1620,
   70/81 = 70 × 20/81 × 20 = 1400/1620
3. Likewise, for the 2nd fraction, since 20 × 81 = 1620,
   63/20 = 63 × 81/20 × 81 = 5103/1620
4. Add the two like fractions:
   1400/1620 + 5103/1620 = 1400 + 5103/1620 = 6503/1620
5. So, 70/81 + 63/20 = 6503/1620
   In mixed form: 423/1620

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