Answers

Subtract 42/24 from 1/81

1^st number: 1/81, 2^nd number: 1 18/24

1/81 - 42/24 is -563/324.

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,
   1/81 = 1 × 8/81 × 8 = 8/648
3. Likewise, for the 2nd fraction, since 24 × 27 = 648,
   42/24 = 42 × 27/24 × 27 = 1134/648
4. Subtract the two like fractions:
   8/648 - 1134/648 = 8 - 1134/648 = -1126/648
5. After reducing the fraction, the answer is -563/324

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