Answers

Add 84/20 and 56/21

1^st number: 4 4/20, 2^nd number: 2 14/21

84/20 + 56/21 is 103/15.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 20 and 21 is 420
   
   Next, find the equivalent fraction of both fractional numbers with denominator 420
2. For the 1st fraction, since 20 × 21 = 420,
   84/20 = 84 × 21/20 × 21 = 1764/420
3. Likewise, for the 2nd fraction, since 21 × 20 = 420,
   56/21 = 56 × 20/21 × 20 = 1120/420
4. Add the two like fractions:
   1764/420 + 1120/420 = 1764 + 1120/420 = 2884/420
5. 2884/420 simplified gives 103/15
6. So, 84/20 + 56/21 = 103/15
   In mixed form: 613/15

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