Answers

Add 72/70 and 20/81

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

72/70 + 20/81 is 3616/2835.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 70 and 81 is 5670
   
   Next, find the equivalent fraction of both fractional numbers with denominator 5670
2. For the 1st fraction, since 70 × 81 = 5670,
   72/70 = 72 × 81/70 × 81 = 5832/5670
3. Likewise, for the 2nd fraction, since 81 × 70 = 5670,
   20/81 = 20 × 70/81 × 70 = 1400/5670
4. Add the two like fractions:
   5832/5670 + 1400/5670 = 5832 + 1400/5670 = 7232/5670
5. 7232/5670 simplified gives 3616/2835
6. So, 72/70 + 20/81 = 3616/2835
   In mixed form: 1781/2835

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