Answers

Add 75/20 and 27/84

1^st number: 3 15/20, 2^nd number: 27/84

75/20 + 27/84 is 57/14.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 20 and 84 is 420
   
   Next, find the equivalent fraction of both fractional numbers with denominator 420
2. For the 1st fraction, since 20 × 21 = 420,
   75/20 = 75 × 21/20 × 21 = 1575/420
3. Likewise, for the 2nd fraction, since 84 × 5 = 420,
   27/84 = 27 × 5/84 × 5 = 135/420
4. Add the two like fractions:
   1575/420 + 135/420 = 1575 + 135/420 = 1710/420
5. 1710/420 simplified gives 57/14
6. So, 75/20 + 27/84 = 57/14
   In mixed form: 41/14

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