The mixed number 31 90/20 written as an improper fraction is 710/20
To turn the mixed number 31 90/20 into an improper fraction, use these simple steps:
First, multiply the whole number by the denominator of the fractional part: 31 × 20 = 620.
After that, add the result to the numerator of the fractional part: 620 + 90 = 710.
Next, Write the sum of the previous step on the original denominator: 710/20.
This means that 31 90/20, as an improper fraction, equals 710/20.
See also: 31 90/20 as a decimal