Answers

Add 81/28 and 12/72

1^st number: 2 25/28, 2^nd number: 12/72

81/28 + 12/72 is 257/84.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 28 and 72 is 504
   
   Next, find the equivalent fraction of both fractional numbers with denominator 504
2. For the 1st fraction, since 28 × 18 = 504,
   81/28 = 81 × 18/28 × 18 = 1458/504
3. Likewise, for the 2nd fraction, since 72 × 7 = 504,
   12/72 = 12 × 7/72 × 7 = 84/504
4. Add the two like fractions:
   1458/504 + 84/504 = 1458 + 84/504 = 1542/504
5. 1542/504 simplified gives 257/84
6. So, 81/28 + 12/72 = 257/84
   In mixed form: 35/84

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