Answers

Subtract 90/81 from 70/81

1^st number: 70/81, 2^nd number: 1 9/81

70/81 - 90/81 is -20/81.

Steps for subtracting fractions

1. Subtract the two fractions:
   70/81 - 90/81 = 70 - 90/81 = -20/81

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