Answers

Subtract 42/12 from 15/81

1^st number: 15/81, 2^nd number: 3 6/12

15/81 - 42/12 is -179/54.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 81 and 12 is 324
   
   Next, find the equivalent fraction of both fractional numbers with denominator 324
2. For the 1st fraction, since 81 × 4 = 324,
   15/81 = 15 × 4/81 × 4 = 60/324
3. Likewise, for the 2nd fraction, since 12 × 27 = 324,
   42/12 = 42 × 27/12 × 27 = 1134/324
4. Subtract the two like fractions:
   60/324 - 1134/324 = 60 - 1134/324 = -1074/324
5. After reducing the fraction, the answer is -179/54

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