Answers

Add 10/21 and 72/64

1^st number: 10/21, 2^nd number: 1 8/64

10/21 + 72/64 is 269/168.

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,
   10/21 = 10 × 64/21 × 64 = 640/1344
3. Likewise, for the 2nd fraction, since 64 × 21 = 1344,
   72/64 = 72 × 21/64 × 21 = 1512/1344
4. Add the two like fractions:
   640/1344 + 1512/1344 = 640 + 1512/1344 = 2152/1344
5. 2152/1344 simplified gives 269/168
6. So, 10/21 + 72/64 = 269/168
   In mixed form: 1101/168

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