Answers

Add 72/27 and 81/20

1^st number: 2 18/27, 2^nd number: 4 1/20

72/27 + 81/20 is 403/60.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 27 and 20 is 540
   
   Next, find the equivalent fraction of both fractional numbers with denominator 540
2. For the 1st fraction, since 27 × 20 = 540,
   72/27 = 72 × 20/27 × 20 = 1440/540
3. Likewise, for the 2nd fraction, since 20 × 27 = 540,
   81/20 = 81 × 27/20 × 27 = 2187/540
4. Add the two like fractions:
   1440/540 + 2187/540 = 1440 + 2187/540 = 3627/540
5. 3627/540 simplified gives 403/60
6. So, 72/27 + 81/20 = 403/60
   In mixed form: 643/60

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