Answers

Add 64/3 and 45/21

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

64/3 + 45/21 is 493/21.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 3 and 21 is 21
   
   Next, find the equivalent fraction of both fractional numbers with denominator 21
2. For the 1st fraction, since 3 × 7 = 21,
   64/3 = 64 × 7/3 × 7 = 448/21
3. Likewise, for the 2nd fraction, since 21 × 1 = 21,
   45/21 = 45 × 1/21 × 1 = 45/21
4. Add the two like fractions:
   448/21 + 45/21 = 448 + 45/21 = 493/21
5. So, 64/3 + 45/21 = 493/21
   In mixed form: 2310/21

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