Answers

Add 36/20 and 21/16

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

36/20 + 21/16 is 249/80.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 20 and 16 is 80
   
   Next, find the equivalent fraction of both fractional numbers with denominator 80
2. For the 1st fraction, since 20 × 4 = 80,
   36/20 = 36 × 4/20 × 4 = 144/80
3. Likewise, for the 2nd fraction, since 16 × 5 = 80,
   21/16 = 21 × 5/16 × 5 = 105/80
4. Add the two like fractions:
   144/80 + 105/80 = 144 + 105/80 = 249/80
5. So, 36/20 + 21/16 = 249/80
   In mixed form: 39/80

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