The mixed number 17 78/20 written as an improper fraction is 418/20
To turn the mixed number 17 78/20 into an improper fraction, use these simple steps:
First, multiply the whole number by the denominator of the fractional part: 17 × 20 = 340.
After that, add the result to the numerator of the fractional part: 340 + 78 = 418.
Next, Write the sum of the previous step on the original denominator: 418/20.
This means that 17 78/20, as an improper fraction, equals 418/20.
See also: 17 78/20 as a decimal