Answers

Subtract 3/81 from 42/63

42/63 - 3/81 is 17/27.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 63 and 81 is 567
   
   Next, find the equivalent fraction of both fractional numbers with denominator 567
2. For the 1st fraction, since 63 × 9 = 567,
   42/63 = 42 × 9/63 × 9 = 378/567
3. Likewise, for the 2nd fraction, since 81 × 7 = 567,
   3/81 = 3 × 7/81 × 7 = 21/567
4. Subtract the two like fractions:
   378/567 - 21/567 = 378 - 21/567 = 357/567
5. After reducing the fraction, the answer is 17/27

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