Answers

Subtract 20/4 from 2/81

1^st number: 2/81, 2^nd number: 5 0/4

2/81 - 20/4 is -403/81.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 81 and 4 is 324
   
   Next, find the equivalent fraction of both fractional numbers with denominator 324
2. For the 1st fraction, since 81 × 4 = 324,
   2/81 = 2 × 4/81 × 4 = 8/324
3. Likewise, for the 2nd fraction, since 4 × 81 = 324,
   20/4 = 20 × 81/4 × 81 = 1620/324
4. Subtract the two like fractions:
   8/324 - 1620/324 = 8 - 1620/324 = -1612/324
5. After reducing the fraction, the answer is -403/81

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