Answers

Subtract 50/81 from 10/21

10/21 - 50/81 is -80/567.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 21 and 81 is 567
   
   Next, find the equivalent fraction of both fractional numbers with denominator 567
2. For the 1st fraction, since 21 × 27 = 567,
   10/21 = 10 × 27/21 × 27 = 270/567
3. Likewise, for the 2nd fraction, since 81 × 7 = 567,
   50/81 = 50 × 7/81 × 7 = 350/567
4. Subtract the two like fractions:
   270/567 - 350/567 = 270 - 350/567 = -80/567

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