Answers

Add 20/84 and 84/12

1^st number: 20/84, 2^nd number: 7 0/12

20/84 + 84/12 is 152/21.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 84 and 12 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 12 × 7 = 84,
   84/12 = 84 × 7/12 × 7 = 588/84
4. Add the two like fractions:
   20/84 + 588/84 = 20 + 588/84 = 608/84
5. 608/84 simplified gives 152/21
6. So, 20/84 + 84/12 = 152/21
   In mixed form: 75/21

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