Answers

Subtract 21/63 from 25/64

25/64 - 21/63 is 11/192.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 64 and 63 is 4032
   
   Next, find the equivalent fraction of both fractional numbers with denominator 4032
2. For the 1st fraction, since 64 × 63 = 4032,
   25/64 = 25 × 63/64 × 63 = 1575/4032
3. Likewise, for the 2nd fraction, since 63 × 64 = 4032,
   21/63 = 21 × 64/63 × 64 = 1344/4032
4. Subtract the two like fractions:
   1575/4032 - 1344/4032 = 1575 - 1344/4032 = 231/4032
5. After reducing the fraction, the answer is 11/192

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