Answers

Add 12/81 and 54/60

12/81 + 54/60 is 283/270.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 81 and 60 is 1620
   
   Next, find the equivalent fraction of both fractional numbers with denominator 1620
2. For the 1st fraction, since 81 × 20 = 1620,
   12/81 = 12 × 20/81 × 20 = 240/1620
3. Likewise, for the 2nd fraction, since 60 × 27 = 1620,
   54/60 = 54 × 27/60 × 27 = 1458/1620
4. Add the two like fractions:
   240/1620 + 1458/1620 = 240 + 1458/1620 = 1698/1620
5. 1698/1620 simplified gives 283/270
6. So, 12/81 + 54/60 = 283/270
   In mixed form: 113/270

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