Answers

Add 20/84 and 18/27

20/84 + 18/27 is 19/21.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 84 and 27 is 756
   
   Next, find the equivalent fraction of both fractional numbers with denominator 756
2. For the 1st fraction, since 84 × 9 = 756,
   20/84 = 20 × 9/84 × 9 = 180/756
3. Likewise, for the 2nd fraction, since 27 × 28 = 756,
   18/27 = 18 × 28/27 × 28 = 504/756
4. Add the two like fractions:
   180/756 + 504/756 = 180 + 504/756 = 684/756
5. 684/756 simplified gives 19/21
6. So, 20/84 + 18/27 = 19/21

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