Answers

Subtract 15/24 from 2/81

2/81 - 15/24 is -389/648.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 81 and 24 is 648
   
   Next, find the equivalent fraction of both fractional numbers with denominator 648
2. For the 1st fraction, since 81 × 8 = 648,
   2/81 = 2 × 8/81 × 8 = 16/648
3. Likewise, for the 2nd fraction, since 24 × 27 = 648,
   15/24 = 15 × 27/24 × 27 = 405/648
4. Subtract the two like fractions:
   16/648 - 405/648 = 16 - 405/648 = -389/648

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