Answers

Subtract 30/20 from 2/81

1^st number: 2/81, 2^nd number: 1 10/20

2/81 - 30/20 is -239/162.

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,
   2/81 = 2 × 20/81 × 20 = 40/1620
3. Likewise, for the 2nd fraction, since 20 × 81 = 1620,
   30/20 = 30 × 81/20 × 81 = 2430/1620
4. Subtract the two like fractions:
   40/1620 - 2430/1620 = 40 - 2430/1620 = -2390/1620
5. After reducing the fraction, the answer is -239/162

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