Answers

Add 28/42 and 45/12

1^st number: 28/42, 2^nd number: 3 9/12

28/42 + 45/12 is 53/12.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 42 and 12 is 84
2. For the 1st fraction, since 42 × 2 = 84,
   28/42 = 28 × 2/42 × 2 = 56/84
3. Likewise, for the 2nd fraction, since 12 × 7 = 84,
   45/12 = 45 × 7/12 × 7 = 315/84
4. Add the two fractions:
   56/84 + 315/84 = 56 + 315/84 = 371/84
5. 371/84 simplified gives 53/12
6. So, 28/42 + 45/12 = 53/12
   In mixed form: 45/12

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