Answers

Add 4/84 and 30/90

4/84 + 30/90 is 8/21.

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,
   4/84 = 4 × 15/84 × 15 = 60/1260
3. Likewise, for the 2nd fraction, since 90 × 14 = 1260,
   30/90 = 30 × 14/90 × 14 = 420/1260
4. Add the two like fractions:
   60/1260 + 420/1260 = 60 + 420/1260 = 480/1260
5. 480/1260 simplified gives 8/21
6. So, 4/84 + 30/90 = 8/21

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