Answers

Subtract 7/81 from 25/8

1^st number: 3 1/8, 2^nd number: 7/81

25/8 - 7/81 is 1969/648.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 8 and 81 is 648
   
   Next, find the equivalent fraction of both fractional numbers with denominator 648
2. For the 1st fraction, since 8 × 81 = 648,
   25/8 = 25 × 81/8 × 81 = 2025/648
3. Likewise, for the 2nd fraction, since 81 × 8 = 648,
   7/81 = 7 × 8/81 × 8 = 56/648
4. Subtract the two like fractions:
   2025/648 - 56/648 = 2025 - 56/648 = 1969/648
5. In mixed form: 325/648

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