Answers

Add 81/60 and 30/9

1^st number: 1 21/60, 2^nd number: 3 3/9

81/60 + 30/9 is 281/60.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 60 and 9 is 180
   
   Next, find the equivalent fraction of both fractional numbers with denominator 180
2. For the 1st fraction, since 60 × 3 = 180,
   81/60 = 81 × 3/60 × 3 = 243/180
3. Likewise, for the 2nd fraction, since 9 × 20 = 180,
   30/9 = 30 × 20/9 × 20 = 600/180
4. Add the two like fractions:
   243/180 + 600/180 = 243 + 600/180 = 843/180
5. 843/180 simplified gives 281/60
6. So, 81/60 + 30/9 = 281/60
   In mixed form: 441/60

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