Answers

Subtract 20/81 from 5/2

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

5/2 - 20/81 is 365/162.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 2 and 81 is 162
   
   Next, find the equivalent fraction of both fractional numbers with denominator 162
2. For the 1st fraction, since 2 × 81 = 162,
   5/2 = 5 × 81/2 × 81 = 405/162
3. Likewise, for the 2nd fraction, since 81 × 2 = 162,
   20/81 = 20 × 2/81 × 2 = 40/162
4. Subtract the two like fractions:
   405/162 - 40/162 = 405 - 40/162 = 365/162
5. In mixed form: 241/162

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