Answers

Subtract 21/8 from 4/54

1^st number: 4/54, 2^nd number: 2 5/8

4/54 - 21/8 is -551/216.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 54 and 8 is 216
   
   Next, find the equivalent fraction of both fractional numbers with denominator 216
2. For the 1st fraction, since 54 × 4 = 216,
   4/54 = 4 × 4/54 × 4 = 16/216
3. Likewise, for the 2nd fraction, since 8 × 27 = 216,
   21/8 = 21 × 27/8 × 27 = 567/216
4. Subtract the two like fractions:
   16/216 - 567/216 = 16 - 567/216 = -551/216

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