Answers

Subtract 40/81 from 4/5

4/5 - 40/81 is 124/405.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 5 and 81 is 405
   
   Next, find the equivalent fraction of both fractional numbers with denominator 405
2. For the 1st fraction, since 5 × 81 = 405,
   4/5 = 4 × 81/5 × 81 = 324/405
3. Likewise, for the 2nd fraction, since 81 × 5 = 405,
   40/81 = 40 × 5/81 × 5 = 200/405
4. Subtract the two like fractions:
   324/405 - 200/405 = 324 - 200/405 = 124/405

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