Answers

Add 42/84 and 90/27

1^st number: 42/84, 2^nd number: 3 9/27

42/84 + 90/27 is 23/6.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 84 and 27 is 756
   
   Next, find the equivalent fraction of both fractional numbers with denominator 756
2. For the 1st fraction, since 84 × 9 = 756,
   42/84 = 42 × 9/84 × 9 = 378/756
3. Likewise, for the 2nd fraction, since 27 × 28 = 756,
   90/27 = 90 × 28/27 × 28 = 2520/756
4. Add the two like fractions:
   378/756 + 2520/756 = 378 + 2520/756 = 2898/756
5. 2898/756 simplified gives 23/6
6. So, 42/84 + 90/27 = 23/6
   In mixed form: 35/6

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