Answers

Add 28/90 and 15/84

28/90 + 15/84 is 617/1260.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 90 and 84 is 1260
   
   Next, find the equivalent fraction of both fractional numbers with denominator 1260
2. For the 1st fraction, since 90 × 14 = 1260,
   28/90 = 28 × 14/90 × 14 = 392/1260
3. Likewise, for the 2nd fraction, since 84 × 15 = 1260,
   15/84 = 15 × 15/84 × 15 = 225/1260
4. Add the two like fractions:
   392/1260 + 225/1260 = 392 + 225/1260 = 617/1260
5. So, 28/90 + 15/84 = 617/1260

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