Answers

Subtract 9/64 from 4/90

4/90 - 9/64 is -277/2880.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 90 and 64 is 2880
   
   Next, find the equivalent fraction of both fractional numbers with denominator 2880
2. For the 1st fraction, since 90 × 32 = 2880,
   4/90 = 4 × 32/90 × 32 = 128/2880
3. Likewise, for the 2nd fraction, since 64 × 45 = 2880,
   9/64 = 9 × 45/64 × 45 = 405/2880
4. Subtract the two like fractions:
   128/2880 - 405/2880 = 128 - 405/2880 = -277/2880

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