Answers

Subtract 1/9 from 7/81

7/81 - 1/9 is -2/81.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 81 and 9 is 81
   
   Next, find the equivalent fraction of both fractional numbers with denominator 81
2. For the 1st fraction, since 81 × 1 = 81,
   7/81 = 7 × 1/81 × 1 = 7/81
3. Likewise, for the 2nd fraction, since 9 × 9 = 81,
   1/9 = 1 × 9/9 × 9 = 9/81
4. Subtract the two like fractions:
   7/81 - 9/81 = 7 - 9/81 = -2/81

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