Answers

Subtract 63/64 from 7/20

7/20 - 63/64 is -203/320.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 20 and 64 is 320
   
   Next, find the equivalent fraction of both fractional numbers with denominator 320
2. For the 1st fraction, since 20 × 16 = 320,
   7/20 = 7 × 16/20 × 16 = 112/320
3. Likewise, for the 2nd fraction, since 64 × 5 = 320,
   63/64 = 63 × 5/64 × 5 = 315/320
4. Subtract the two like fractions:
   112/320 - 315/320 = 112 - 315/320 = -203/320

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