Answers

Add 28/42 and 84/21

1^st number: 28/42, 2^nd number: 4 0/21

28/42 + 84/21 is 14/3.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 42 and 21 is 42
   
   Next, find the equivalent fraction of both fractional numbers with denominator 42
2. For the 1st fraction, since 42 × 1 = 42,
   28/42 = 28 × 1/42 × 1 = 28/42
3. Likewise, for the 2nd fraction, since 21 × 2 = 42,
   84/21 = 84 × 2/21 × 2 = 168/42
4. Add the two like fractions:
   28/42 + 168/42 = 28 + 168/42 = 196/42
5. 196/42 simplified gives 14/3
6. So, 28/42 + 84/21 = 14/3
   In mixed form: 42/3

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