The mixed number 31 39/40 written as an improper fraction is 1279/40
To turn the mixed number 31 39/40 into an improper fraction, use these simple steps:
First, multiply the whole number by the denominator of the fractional part: 31 × 40 = 1240.
After that, add the result to the numerator of the fractional part: 1240 + 39 = 1279.
Next, Write the sum of the previous step on the original denominator: 1279/40.
This means that 31 39/40, as an improper fraction, equals 1279/40.
See also: 31 39/40 as a decimal