Answers

Add 21/81 and 75/70

1^st number: 21/81, 2^nd number: 1 5/70

21/81 + 75/70 is 503/378.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 81 and 70 is 5670
   
   Next, find the equivalent fraction of both fractional numbers with denominator 5670
2. For the 1st fraction, since 81 × 70 = 5670,
   21/81 = 21 × 70/81 × 70 = 1470/5670
3. Likewise, for the 2nd fraction, since 70 × 81 = 5670,
   75/70 = 75 × 81/70 × 81 = 6075/5670
4. Add the two like fractions:
   1470/5670 + 6075/5670 = 1470 + 6075/5670 = 7545/5670
5. 7545/5670 simplified gives 503/378
6. So, 21/81 + 75/70 = 503/378
   In mixed form: 1125/378

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