Answers

Add 72/20 and 20/27

1^st number: 3 12/20, 2^nd number: 20/27

72/20 + 20/27 is 586/135.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 20 and 27 is 540
   
   Next, find the equivalent fraction of both fractional numbers with denominator 540
2. For the 1st fraction, since 20 × 27 = 540,
   72/20 = 72 × 27/20 × 27 = 1944/540
3. Likewise, for the 2nd fraction, since 27 × 20 = 540,
   20/27 = 20 × 20/27 × 20 = 400/540
4. Add the two like fractions:
   1944/540 + 400/540 = 1944 + 400/540 = 2344/540
5. 2344/540 simplified gives 586/135
6. So, 72/20 + 20/27 = 586/135
   In mixed form: 446/135

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