Answers

Subtract 42/63 from 12/81

12/81 - 42/63 is -14/27.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 81 and 63 is 567
   
   Next, find the equivalent fraction of both fractional numbers with denominator 567
2. For the 1st fraction, since 81 × 7 = 567,
   12/81 = 12 × 7/81 × 7 = 84/567
3. Likewise, for the 2nd fraction, since 63 × 9 = 567,
   42/63 = 42 × 9/63 × 9 = 378/567
4. Subtract the two like fractions:
   84/567 - 378/567 = 84 - 378/567 = -294/567
5. After reducing the fraction, the answer is -14/27

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