Answers

Add 3/21 and 54/16

1^st number: 3/21, 2^nd number: 3 6/16

3/21 + 54/16 is 197/56.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 21 and 16 is 336
   
   Next, find the equivalent fraction of both fractional numbers with denominator 336
2. For the 1st fraction, since 21 × 16 = 336,
   3/21 = 3 × 16/21 × 16 = 48/336
3. Likewise, for the 2nd fraction, since 16 × 21 = 336,
   54/16 = 54 × 21/16 × 21 = 1134/336
4. Add the two like fractions:
   48/336 + 1134/336 = 48 + 1134/336 = 1182/336
5. 1182/336 simplified gives 197/56
6. So, 3/21 + 54/16 = 197/56
   In mixed form: 329/56

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