Answers

Add 81/28 and 12/60

1^st number: 2 25/28, 2^nd number: 12/60

81/28 + 12/60 is 433/140.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 28 and 60 is 420
   
   Next, find the equivalent fraction of both fractional numbers with denominator 420
2. For the 1st fraction, since 28 × 15 = 420,
   81/28 = 81 × 15/28 × 15 = 1215/420
3. Likewise, for the 2nd fraction, since 60 × 7 = 420,
   12/60 = 12 × 7/60 × 7 = 84/420
4. Add the two like fractions:
   1215/420 + 84/420 = 1215 + 84/420 = 1299/420
5. 1299/420 simplified gives 433/140
6. So, 81/28 + 12/60 = 433/140
   In mixed form: 313/140

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