Answers

Add 3/21 and 81/64

1^st number: 3/21, 2^nd number: 1 17/64

3/21 + 81/64 is 631/448.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 21 and 64 is 1344
   
   Next, find the equivalent fraction of both fractional numbers with denominator 1344
2. For the 1st fraction, since 21 × 64 = 1344,
   3/21 = 3 × 64/21 × 64 = 192/1344
3. Likewise, for the 2nd fraction, since 64 × 21 = 1344,
   81/64 = 81 × 21/64 × 21 = 1701/1344
4. Add the two like fractions:
   192/1344 + 1701/1344 = 192 + 1701/1344 = 1893/1344
5. 1893/1344 simplified gives 631/448
6. So, 3/21 + 81/64 = 631/448
   In mixed form: 1183/448

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