Answers

Add 21/10 and 45/64

1^st number: 2 1/10, 2^nd number: 45/64

21/10 + 45/64 is 897/320.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 10 and 64 is 320
   
   Next, find the equivalent fraction of both fractional numbers with denominator 320
2. For the 1st fraction, since 10 × 32 = 320,
   21/10 = 21 × 32/10 × 32 = 672/320
3. Likewise, for the 2nd fraction, since 64 × 5 = 320,
   45/64 = 45 × 5/64 × 5 = 225/320
4. Add the two like fractions:
   672/320 + 225/320 = 672 + 225/320 = 897/320
5. So, 21/10 + 45/64 = 897/320
   In mixed form: 2257/320

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