The mixed number 15 78/80 written as an improper fraction is 1278/80
To turn the mixed number 15 78/80 into an improper fraction, use these simple steps:
First, multiply the whole number by the denominator of the fractional part: 15 × 80 = 1200.
After that, add the result to the numerator of the fractional part: 1200 + 78 = 1278.
Next, Write the sum of the previous step on the original denominator: 1278/80.
This means that 15 78/80, as an improper fraction, equals 1278/80.
See also: 15 78/80 as a decimal