Answers

Subtract 15/4 from 28/81

1^st number: 28/81, 2^nd number: 3 3/4

28/81 - 15/4 is -1103/324.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 81 and 4 is 324
   
   Next, find the equivalent fraction of both fractional numbers with denominator 324
2. For the 1st fraction, since 81 × 4 = 324,
   28/81 = 28 × 4/81 × 4 = 112/324
3. Likewise, for the 2nd fraction, since 4 × 81 = 324,
   15/4 = 15 × 81/4 × 81 = 1215/324
4. Subtract the two like fractions:
   112/324 - 1215/324 = 112 - 1215/324 = -1103/324

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