Answers

Add 18/84 and 20/63

18/84 + 20/63 is 67/126.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 84 and 63 is 252
   
   Next, find the equivalent fraction of both fractional numbers with denominator 252
2. For the 1st fraction, since 84 × 3 = 252,
   18/84 = 18 × 3/84 × 3 = 54/252
3. Likewise, for the 2nd fraction, since 63 × 4 = 252,
   20/63 = 20 × 4/63 × 4 = 80/252
4. Add the two like fractions:
   54/252 + 80/252 = 54 + 80/252 = 134/252
5. 134/252 simplified gives 67/126
6. So, 18/84 + 20/63 = 67/126

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