Answers

Add 84/18 and 42/21

1^st number: 4 12/18, 2^nd number: 2 0/21

84/18 + 42/21 is 20/3.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 18 and 21 is 126
   
   Next, find the equivalent fraction of both fractional numbers with denominator 126
2. For the 1st fraction, since 18 × 7 = 126,
   84/18 = 84 × 7/18 × 7 = 588/126
3. Likewise, for the 2nd fraction, since 21 × 6 = 126,
   42/21 = 42 × 6/21 × 6 = 252/126
4. Add the two like fractions:
   588/126 + 252/126 = 588 + 252/126 = 840/126
5. 840/126 simplified gives 20/3
6. So, 84/18 + 42/21 = 20/3
   In mixed form: 62/3

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