Answers

Subtract 42/63 from 28/81

28/81 - 42/63 is -26/81.

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,
   28/81 = 28 × 7/81 × 7 = 196/567
3. Likewise, for the 2nd fraction, since 63 × 9 = 567,
   42/63 = 42 × 9/63 × 9 = 378/567
4. Subtract the two like fractions:
   196/567 - 378/567 = 196 - 378/567 = -182/567
5. After reducing the fraction, the answer is -26/81

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