Answers

Add 20/84 and 42/54

20/84 + 42/54 is 64/63.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 84 and 54 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 54 × 14 = 756,
   42/54 = 42 × 14/54 × 14 = 588/756
4. Add the two like fractions:
   180/756 + 588/756 = 180 + 588/756 = 768/756
5. 768/756 simplified gives 64/63
6. So, 20/84 + 42/54 = 64/63
   In mixed form: 11/63

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