Answers

Add 5/60 and 7/81

5/60 + 7/81 is 55/324.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 60 and 81 is 1620
   
   Next, find the equivalent fraction of both fractional numbers with denominator 1620
2. For the 1st fraction, since 60 × 27 = 1620,
   5/60 = 5 × 27/60 × 27 = 135/1620
3. Likewise, for the 2nd fraction, since 81 × 20 = 1620,
   7/81 = 7 × 20/81 × 20 = 140/1620
4. Add the two like fractions:
   135/1620 + 140/1620 = 135 + 140/1620 = 275/1620
5. 275/1620 simplified gives 55/324
6. So, 5/60 + 7/81 = 55/324

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