Answers

Subtract 8/20 from 32/81

32/81 - 8/20 is -2/405.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 81 and 20 is 1620
   
   Next, find the equivalent fraction of both fractional numbers with denominator 1620
2. For the 1st fraction, since 81 × 20 = 1620,
   32/81 = 32 × 20/81 × 20 = 640/1620
3. Likewise, for the 2nd fraction, since 20 × 81 = 1620,
   8/20 = 8 × 81/20 × 81 = 648/1620
4. Subtract the two like fractions:
   640/1620 - 648/1620 = 640 - 648/1620 = -8/1620
5. After reducing the fraction, the answer is -2/405

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