Answers

Subtract 4/7 from 40/81

40/81 - 4/7 is -44/567.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 81 and 7 is 567
   
   Next, find the equivalent fraction of both fractional numbers with denominator 567
2. For the 1st fraction, since 81 × 7 = 567,
   40/81 = 40 × 7/81 × 7 = 280/567
3. Likewise, for the 2nd fraction, since 7 × 81 = 567,
   4/7 = 4 × 81/7 × 81 = 324/567
4. Subtract the two like fractions:
   280/567 - 324/567 = 280 - 324/567 = -44/567

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