Answers

Add 81/60 and 42/27

1^st number: 1 21/60, 2^nd number: 1 15/27

81/60 + 42/27 is 523/180.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 60 and 27 is 540
   
   Next, find the equivalent fraction of both fractional numbers with denominator 540
2. For the 1st fraction, since 60 × 9 = 540,
   81/60 = 81 × 9/60 × 9 = 729/540
3. Likewise, for the 2nd fraction, since 27 × 20 = 540,
   42/27 = 42 × 20/27 × 20 = 840/540
4. Add the two like fractions:
   729/540 + 840/540 = 729 + 840/540 = 1569/540
5. 1569/540 simplified gives 523/180
6. So, 81/60 + 42/27 = 523/180
   In mixed form: 2163/180

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