Answers

Subtract 5/20 from 81/40

1^st number: 2 1/40, 2^nd number: 5/20

81/40 - 5/20 is 71/40.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 40 and 20 is 40
   
   Next, find the equivalent fraction of both fractional numbers with denominator 40
2. For the 1st fraction, since 40 × 1 = 40,
   81/40 = 81 × 1/40 × 1 = 81/40
3. Likewise, for the 2nd fraction, since 20 × 2 = 40,
   5/20 = 5 × 2/20 × 2 = 10/40
4. Subtract the two like fractions:
   81/40 - 10/40 = 81 - 10/40 = 71/40
5. In mixed form: 131/40

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