Answers

Subtract 1/81 from 54/20

1^st number: 2 14/20, 2^nd number: 1/81

54/20 - 1/81 is 2177/810.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 20 and 81 is 1620
   
   Next, find the equivalent fraction of both fractional numbers with denominator 1620
2. For the 1st fraction, since 20 × 81 = 1620,
   54/20 = 54 × 81/20 × 81 = 4374/1620
3. Likewise, for the 2nd fraction, since 81 × 20 = 1620,
   1/81 = 1 × 20/81 × 20 = 20/1620
4. Subtract the two like fractions:
   4374/1620 - 20/1620 = 4374 - 20/1620 = 4354/1620
5. After reducing the fraction, the answer is 2177/810
6. In mixed form: 2557/810

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