The mixed number 105 9/80 written as an improper fraction is 8409/80
To turn the mixed number 105 9/80 into an improper fraction, use these simple steps:
First, multiply the whole number by the denominator of the fractional part: 105 × 80 = 8400.
After that, add the result to the numerator of the fractional part: 8400 + 9 = 8409.
Next, Write the sum of the previous step on the original denominator: 8409/80.
This means that 105 9/80, as an improper fraction, equals 8409/80.
See also: 105 9/80 as a decimal