Answers

Subtract 18/7 from 81/64

1^st number: 1 17/64, 2^nd number: 2 4/7

81/64 - 18/7 is -585/448.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 64 and 7 is 448
   
   Next, find the equivalent fraction of both fractional numbers with denominator 448
2. For the 1st fraction, since 64 × 7 = 448,
   81/64 = 81 × 7/64 × 7 = 567/448
3. Likewise, for the 2nd fraction, since 7 × 64 = 448,
   18/7 = 18 × 64/7 × 64 = 1152/448
4. Subtract the two like fractions:
   567/448 - 1152/448 = 567 - 1152/448 = -585/448

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