Answers

Subtract 40/81 from 1/7

1/7 - 40/81 is -199/567.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 7 and 81 is 567
   
   Next, find the equivalent fraction of both fractional numbers with denominator 567
2. For the 1st fraction, since 7 × 81 = 567,
   1/7 = 1 × 81/7 × 81 = 81/567
3. Likewise, for the 2nd fraction, since 81 × 7 = 567,
   40/81 = 40 × 7/81 × 7 = 280/567
4. Subtract the two like fractions:
   81/567 - 280/567 = 81 - 280/567 = -199/567

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