Answers

Subtract 63/4 from 30/81

1^st number: 30/81, 2^nd number: 15 3/4

30/81 - 63/4 is -1661/108.

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,
   30/81 = 30 × 4/81 × 4 = 120/324
3. Likewise, for the 2nd fraction, since 4 × 81 = 324,
   63/4 = 63 × 81/4 × 81 = 5103/324
4. Subtract the two like fractions:
   120/324 - 5103/324 = 120 - 5103/324 = -4983/324
5. After reducing the fraction, the answer is -1661/108

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