Answers

Add 9/84 and 15/90

9/84 + 15/90 is 23/84.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 84 and 90 is 1260
   
   Next, find the equivalent fraction of both fractional numbers with denominator 1260
2. For the 1st fraction, since 84 × 15 = 1260,
   9/84 = 9 × 15/84 × 15 = 135/1260
3. Likewise, for the 2nd fraction, since 90 × 14 = 1260,
   15/90 = 15 × 14/90 × 14 = 210/1260
4. Add the two like fractions:
   135/1260 + 210/1260 = 135 + 210/1260 = 345/1260
5. 345/1260 simplified gives 23/84
6. So, 9/84 + 15/90 = 23/84

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