Answers

Add 15/84 and 18/42

15/84 + 18/42 is 17/28.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 84 and 42 is 84
   
   Next, find the equivalent fraction of both fractional numbers with denominator 84
2. For the 1st fraction, since 84 × 1 = 84,
   15/84 = 15 × 1/84 × 1 = 15/84
3. Likewise, for the 2nd fraction, since 42 × 2 = 84,
   18/42 = 18 × 2/42 × 2 = 36/84
4. Add the two like fractions:
   15/84 + 36/84 = 15 + 36/84 = 51/84
5. 51/84 simplified gives 17/28
6. So, 15/84 + 18/42 = 17/28

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