Answers

Add 21/5 and 15/16

1^st number: 4 1/5, 2^nd number: 15/16

21/5 + 15/16 is 411/80.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 5 and 16 is 80
   
   Next, find the equivalent fraction of both fractional numbers with denominator 80
2. For the 1st fraction, since 5 × 16 = 80,
   21/5 = 21 × 16/5 × 16 = 336/80
3. Likewise, for the 2nd fraction, since 16 × 5 = 80,
   15/16 = 15 × 5/16 × 5 = 75/80
4. Add the two like fractions:
   336/80 + 75/80 = 336 + 75/80 = 411/80
5. So, 21/5 + 15/16 = 411/80
   In mixed form: 511/80

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