Answers

Add 72/36 and 81/30

1^st number: 2 0/36, 2^nd number: 2 21/30

72/36 + 81/30 is 47/10.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 36 and 30 is 180
   
   Next, find the equivalent fraction of both fractional numbers with denominator 180
2. For the 1st fraction, since 36 × 5 = 180,
   72/36 = 72 × 5/36 × 5 = 360/180
3. Likewise, for the 2nd fraction, since 30 × 6 = 180,
   81/30 = 81 × 6/30 × 6 = 486/180
4. Add the two like fractions:
   360/180 + 486/180 = 360 + 486/180 = 846/180
5. 846/180 simplified gives 47/10
6. So, 72/36 + 81/30 = 47/10
   In mixed form: 47/10

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