Answers

Subtract 90/81 from 4/81

1^st number: 4/81, 2^nd number: 1 9/81

4/81 - 90/81 is -86/81.

Steps for subtracting fractions

1. Subtract the two fractions:
   4/81 - 90/81 = 4 - 90/81 = -86/81

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