Answers

Add 8/84 and 15/45

8/84 + 15/45 is 3/7.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 84 and 45 is 1260
   
   Next, find the equivalent fraction of both fractional numbers with denominator 1260
2. For the 1st fraction, since 84 × 15 = 1260,
   8/84 = 8 × 15/84 × 15 = 120/1260
3. Likewise, for the 2nd fraction, since 45 × 28 = 1260,
   15/45 = 15 × 28/45 × 28 = 420/1260
4. Add the two like fractions:
   120/1260 + 420/1260 = 120 + 420/1260 = 540/1260
5. 540/1260 simplified gives 3/7
6. So, 8/84 + 15/45 = 3/7

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