Answers

Add 81/42 and 25/28

1^st number: 1 39/42, 2^nd number: 25/28

81/42 + 25/28 is 79/28.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 42 and 28 is 84
   
   Next, find the equivalent fraction of both fractional numbers with denominator 84
2. For the 1st fraction, since 42 × 2 = 84,
   81/42 = 81 × 2/42 × 2 = 162/84
3. Likewise, for the 2nd fraction, since 28 × 3 = 84,
   25/28 = 25 × 3/28 × 3 = 75/84
4. Add the two like fractions:
   162/84 + 75/84 = 162 + 75/84 = 237/84
5. 237/84 simplified gives 79/28
6. So, 81/42 + 25/28 = 79/28
   In mixed form: 223/28

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