The mixed number 18 99/80 written as an improper fraction is 1539/80
To turn the mixed number 18 99/80 into an improper fraction, use these simple steps:
First, multiply the whole number by the denominator of the fractional part: 18 × 80 = 1440.
After that, add the result to the numerator of the fractional part: 1440 + 99 = 1539.
Next, Write the sum of the previous step on the original denominator: 1539/80.
This means that 18 99/80, as an improper fraction, equals 1539/80.
See also: 18 99/80 as a decimal