The mixed number 81 18/20 written as an improper fraction is 1638/20
To turn the mixed number 81 18/20 into an improper fraction, use these simple steps:
First, multiply the whole number by the denominator of the fractional part: 81 × 20 = 1620.
After that, add the result to the numerator of the fractional part: 1620 + 18 = 1638.
Next, Write the sum of the previous step on the original denominator: 1638/20.
This means that 81 18/20, as an improper fraction, equals 1638/20.
See also: 81 18/20 as a decimal