Answers

Subtract 4/20 from 81/5

1^st number: 16 1/5, 2^nd number: 4/20

81/5 - 4/20 is 16/1.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 5 and 20 is 20
   
   Next, find the equivalent fraction of both fractional numbers with denominator 20
2. For the 1st fraction, since 5 × 4 = 20,
   81/5 = 81 × 4/5 × 4 = 324/20
3. Likewise, for the 2nd fraction, since 20 × 1 = 20,
   4/20 = 4 × 1/20 × 1 = 4/20
4. Subtract the two like fractions:
   324/20 - 4/20 = 324 - 4/20 = 320/20
5. After reducing the fraction, the answer is 16/1

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