Answers

Add 30/84 and 21/20

1^st number: 30/84, 2^nd number: 1 1/20

30/84 + 21/20 is 197/140.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 84 and 20 is 420
   
   Next, find the equivalent fraction of both fractional numbers with denominator 420
2. For the 1st fraction, since 84 × 5 = 420,
   30/84 = 30 × 5/84 × 5 = 150/420
3. Likewise, for the 2nd fraction, since 20 × 21 = 420,
   21/20 = 21 × 21/20 × 21 = 441/420
4. Add the two like fractions:
   150/420 + 441/420 = 150 + 441/420 = 591/420
5. 591/420 simplified gives 197/140
6. So, 30/84 + 21/20 = 197/140
   In mixed form: 157/140

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