Answers

Subtract 10/81 from 20/28

20/28 - 10/81 is 335/567.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 28 and 81 is 2268
   
   Next, find the equivalent fraction of both fractional numbers with denominator 2268
2. For the 1st fraction, since 28 × 81 = 2268,
   20/28 = 20 × 81/28 × 81 = 1620/2268
3. Likewise, for the 2nd fraction, since 81 × 28 = 2268,
   10/81 = 10 × 28/81 × 28 = 280/2268
4. Subtract the two like fractions:
   1620/2268 - 280/2268 = 1620 - 280/2268 = 1340/2268
5. After reducing the fraction, the answer is 335/567

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