Answers

Add 54/81 and 30/70

54/81 + 30/70 is 23/21.

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,
   54/81 = 54 × 70/81 × 70 = 3780/5670
3. Likewise, for the 2nd fraction, since 70 × 81 = 5670,
   30/70 = 30 × 81/70 × 81 = 2430/5670
4. Add the two like fractions:
   3780/5670 + 2430/5670 = 3780 + 2430/5670 = 6210/5670
5. 6210/5670 simplified gives 23/21
6. So, 54/81 + 30/70 = 23/21
   In mixed form: 12/21

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