Answers

Add 30/81 and 90/70

1^st number: 30/81, 2^nd number: 1 20/70

30/81 + 90/70 is 313/189.

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,
   30/81 = 30 × 70/81 × 70 = 2100/5670
3. Likewise, for the 2nd fraction, since 70 × 81 = 5670,
   90/70 = 90 × 81/70 × 81 = 7290/5670
4. Add the two like fractions:
   2100/5670 + 7290/5670 = 2100 + 7290/5670 = 9390/5670
5. 9390/5670 simplified gives 313/189
6. So, 30/81 + 90/70 = 313/189
   In mixed form: 1124/189

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