Answers

Subtract 20/18 from 12/81

1^st number: 12/81, 2^nd number: 1 2/18

12/81 - 20/18 is -26/27.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 81 and 18 is 162
   
   Next, find the equivalent fraction of both fractional numbers with denominator 162
2. For the 1st fraction, since 81 × 2 = 162,
   12/81 = 12 × 2/81 × 2 = 24/162
3. Likewise, for the 2nd fraction, since 18 × 9 = 162,
   20/18 = 20 × 9/18 × 9 = 180/162
4. Subtract the two like fractions:
   24/162 - 180/162 = 24 - 180/162 = -156/162
5. After reducing the fraction, the answer is -26/27

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