Answers

Subtract 5/81 from 7/40

7/40 - 5/81 is 367/3240.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 40 and 81 is 3240
   
   Next, find the equivalent fraction of both fractional numbers with denominator 3240
2. For the 1st fraction, since 40 × 81 = 3240,
   7/40 = 7 × 81/40 × 81 = 567/3240
3. Likewise, for the 2nd fraction, since 81 × 40 = 3240,
   5/81 = 5 × 40/81 × 40 = 200/3240
4. Subtract the two like fractions:
   567/3240 - 200/3240 = 567 - 200/3240 = 367/3240

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