Answers

Add 25/30 and 4/81

25/30 + 4/81 is 143/162.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 30 and 81 is 810
   
   Next, find the equivalent fraction of both fractional numbers with denominator 810
2. For the 1st fraction, since 30 × 27 = 810,
   25/30 = 25 × 27/30 × 27 = 675/810
3. Likewise, for the 2nd fraction, since 81 × 10 = 810,
   4/81 = 4 × 10/81 × 10 = 40/810
4. Add the two like fractions:
   675/810 + 40/810 = 675 + 40/810 = 715/810
5. 715/810 simplified gives 143/162
6. So, 25/30 + 4/81 = 143/162

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