Answers

Add 20/84 and 84/42

1^st number: 20/84, 2^nd number: 2 0/42

20/84 + 84/42 is 47/21.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 84 and 42 is 84
   
   Next, find the equivalent fraction of both fractional numbers with denominator 84
2. For the 1st fraction, since 84 × 1 = 84,
   20/84 = 20 × 1/84 × 1 = 20/84
3. Likewise, for the 2nd fraction, since 42 × 2 = 84,
   84/42 = 84 × 2/42 × 2 = 168/84
4. Add the two like fractions:
   20/84 + 168/84 = 20 + 168/84 = 188/84
5. 188/84 simplified gives 47/21
6. So, 20/84 + 84/42 = 47/21
   In mixed form: 25/21

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