Answers

Subtract 9/8 from 21/64

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

21/64 - 9/8 is -51/64.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 64 and 8 is 64
   
   Next, find the equivalent fraction of both fractional numbers with denominator 64
2. For the 1st fraction, since 64 × 1 = 64,
   21/64 = 21 × 1/64 × 1 = 21/64
3. Likewise, for the 2nd fraction, since 8 × 8 = 64,
   9/8 = 9 × 8/8 × 8 = 72/64
4. Subtract the two like fractions:
   21/64 - 72/64 = 21 - 72/64 = -51/64

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