Answers

Add 21/16 and 6/20

1^st number: 1 5/16, 2^nd number: 6/20

21/16 + 6/20 is 129/80.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 16 and 20 is 80
   
   Next, find the equivalent fraction of both fractional numbers with denominator 80
2. For the 1st fraction, since 16 × 5 = 80,
   21/16 = 21 × 5/16 × 5 = 105/80
3. Likewise, for the 2nd fraction, since 20 × 4 = 80,
   6/20 = 6 × 4/20 × 4 = 24/80
4. Add the two like fractions:
   105/80 + 24/80 = 105 + 24/80 = 129/80
5. So, 21/16 + 6/20 = 129/80
   In mixed form: 149/80

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