Answers

Add 20/84 and 10/90

20/84 + 10/90 is 22/63.

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,
   20/84 = 20 × 15/84 × 15 = 300/1260
3. Likewise, for the 2nd fraction, since 90 × 14 = 1260,
   10/90 = 10 × 14/90 × 14 = 140/1260
4. Add the two like fractions:
   300/1260 + 140/1260 = 300 + 140/1260 = 440/1260
5. 440/1260 simplified gives 22/63
6. So, 20/84 + 10/90 = 22/63

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