Answers

Subtract 14/20 from 28/81

28/81 - 14/20 is -287/810.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 81 and 20 is 1620
   
   Next, find the equivalent fraction of both fractional numbers with denominator 1620
2. For the 1st fraction, since 81 × 20 = 1620,
   28/81 = 28 × 20/81 × 20 = 560/1620
3. Likewise, for the 2nd fraction, since 20 × 81 = 1620,
   14/20 = 14 × 81/20 × 81 = 1134/1620
4. Subtract the two like fractions:
   560/1620 - 1134/1620 = 560 - 1134/1620 = -574/1620
5. After reducing the fraction, the answer is -287/810

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