Answers

Add 21/4 and 56/20

1^st number: 5 1/4, 2^nd number: 2 16/20

21/4 + 56/20 is 161/20.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 4 and 20 is 20
   
   Next, find the equivalent fraction of both fractional numbers with denominator 20
2. For the 1st fraction, since 4 × 5 = 20,
   21/4 = 21 × 5/4 × 5 = 105/20
3. Likewise, for the 2nd fraction, since 20 × 1 = 20,
   56/20 = 56 × 1/20 × 1 = 56/20
4. Add the two like fractions:
   105/20 + 56/20 = 105 + 56/20 = 161/20
5. So, 21/4 + 56/20 = 161/20
   In mixed form: 81/20

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