Answers

Add 15/84 and 30/75

15/84 + 30/75 is 81/140.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 84 and 75 is 2100
   
   Next, find the equivalent fraction of both fractional numbers with denominator 2100
2. For the 1st fraction, since 84 × 25 = 2100,
   15/84 = 15 × 25/84 × 25 = 375/2100
3. Likewise, for the 2nd fraction, since 75 × 28 = 2100,
   30/75 = 30 × 28/75 × 28 = 840/2100
4. Add the two like fractions:
   375/2100 + 840/2100 = 375 + 840/2100 = 1215/2100
5. 1215/2100 simplified gives 81/140
6. So, 15/84 + 30/75 = 81/140

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