Answers

Add 42/84 and 15/36

42/84 + 15/36 is 11/12.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 84 and 36 is 252
   
   Next, find the equivalent fraction of both fractional numbers with denominator 252
2. For the 1st fraction, since 84 × 3 = 252,
   42/84 = 42 × 3/84 × 3 = 126/252
3. Likewise, for the 2nd fraction, since 36 × 7 = 252,
   15/36 = 15 × 7/36 × 7 = 105/252
4. Add the two like fractions:
   126/252 + 105/252 = 126 + 105/252 = 231/252
5. 231/252 simplified gives 11/12
6. So, 42/84 + 15/36 = 11/12

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