Answers

Subtract 7/81 from 25/4

1^st number: 6 1/4, 2^nd number: 7/81

25/4 - 7/81 is 1997/324.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 4 and 81 is 324
   
   Next, find the equivalent fraction of both fractional numbers with denominator 324
2. For the 1st fraction, since 4 × 81 = 324,
   25/4 = 25 × 81/4 × 81 = 2025/324
3. Likewise, for the 2nd fraction, since 81 × 4 = 324,
   7/81 = 7 × 4/81 × 4 = 28/324
4. Subtract the two like fractions:
   2025/324 - 28/324 = 2025 - 28/324 = 1997/324
5. In mixed form: 653/324

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