Answers

Add 21/75 and 56/64

21/75 + 56/64 is 231/200.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 75 and 64 is 4800
   
   Next, find the equivalent fraction of both fractional numbers with denominator 4800
2. For the 1st fraction, since 75 × 64 = 4800,
   21/75 = 21 × 64/75 × 64 = 1344/4800
3. Likewise, for the 2nd fraction, since 64 × 75 = 4800,
   56/64 = 56 × 75/64 × 75 = 4200/4800
4. Add the two like fractions:
   1344/4800 + 4200/4800 = 1344 + 4200/4800 = 5544/4800
5. 5544/4800 simplified gives 231/200
6. So, 21/75 + 56/64 = 231/200
   In mixed form: 131/200

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