Answers

Subtract 6/72 from 1/81

1/81 - 6/72 is -23/324.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 81 and 72 is 648
   
   Next, find the equivalent fraction of both fractional numbers with denominator 648
2. For the 1st fraction, since 81 × 8 = 648,
   1/81 = 1 × 8/81 × 8 = 8/648
3. Likewise, for the 2nd fraction, since 72 × 9 = 648,
   6/72 = 6 × 9/72 × 9 = 54/648
4. Subtract the two like fractions:
   8/648 - 54/648 = 8 - 54/648 = -46/648
5. After reducing the fraction, the answer is -23/324

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