Answers

Subtract 7/27 from 1/81

1/81 - 7/27 is -20/81.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 81 and 27 is 81
   
   Next, find the equivalent fraction of both fractional numbers with denominator 81
2. For the 1st fraction, since 81 × 1 = 81,
   1/81 = 1 × 1/81 × 1 = 1/81
3. Likewise, for the 2nd fraction, since 27 × 3 = 81,
   7/27 = 7 × 3/27 × 3 = 21/81
4. Subtract the two like fractions:
   1/81 - 21/81 = 1 - 21/81 = -20/81

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