Answers

Add 81/72 and 27/30

1^st number: 1 9/72, 2^nd number: 27/30

81/72 + 27/30 is 81/40.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 72 and 30 is 360
   
   Next, find the equivalent fraction of both fractional numbers with denominator 360
2. For the 1st fraction, since 72 × 5 = 360,
   81/72 = 81 × 5/72 × 5 = 405/360
3. Likewise, for the 2nd fraction, since 30 × 12 = 360,
   27/30 = 27 × 12/30 × 12 = 324/360
4. Add the two like fractions:
   405/360 + 324/360 = 405 + 324/360 = 729/360
5. 729/360 simplified gives 81/40
6. So, 81/72 + 27/30 = 81/40
   In mixed form: 21/40

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