Answers

Subtract 8/81 from 90/75

1^st number: 1 15/75, 2^nd number: 8/81

90/75 - 8/81 is 446/405.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 75 and 81 is 2025
   
   Next, find the equivalent fraction of both fractional numbers with denominator 2025
2. For the 1st fraction, since 75 × 27 = 2025,
   90/75 = 90 × 27/75 × 27 = 2430/2025
3. Likewise, for the 2nd fraction, since 81 × 25 = 2025,
   8/81 = 8 × 25/81 × 25 = 200/2025
4. Subtract the two like fractions:
   2430/2025 - 200/2025 = 2430 - 200/2025 = 2230/2025
5. After reducing the fraction, the answer is 446/405
6. In mixed form: 141/405

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