Answers

Add 64/21 and 21/12

1^st number: 3 1/21, 2^nd number: 1 9/12

64/21 + 21/12 is 403/84.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 21 and 12 is 84
   
   Next, find the equivalent fraction of both fractional numbers with denominator 84
2. For the 1st fraction, since 21 × 4 = 84,
   64/21 = 64 × 4/21 × 4 = 256/84
3. Likewise, for the 2nd fraction, since 12 × 7 = 84,
   21/12 = 21 × 7/12 × 7 = 147/84
4. Add the two like fractions:
   256/84 + 147/84 = 256 + 147/84 = 403/84
5. So, 64/21 + 21/12 = 403/84
   In mixed form: 467/84

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