Answers

Add 28/81 and 18/60

28/81 + 18/60 is 523/810.

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,
   28/81 = 28 × 20/81 × 20 = 560/1620
3. Likewise, for the 2nd fraction, since 60 × 27 = 1620,
   18/60 = 18 × 27/60 × 27 = 486/1620
4. Add the two like fractions:
   560/1620 + 486/1620 = 560 + 486/1620 = 1046/1620
5. 1046/1620 simplified gives 523/810
6. So, 28/81 + 18/60 = 523/810

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