The mixed number 12 9/40 written as an improper fraction is 489/40
To turn the mixed number 12 9/40 into an improper fraction, use these simple steps:
First, multiply the whole number by the denominator of the fractional part: 12 × 40 = 480.
After that, add the result to the numerator of the fractional part: 480 + 9 = 489.
Next, Write the sum of the previous step on the original denominator: 489/40.
This means that 12 9/40, as an improper fraction, equals 489/40.
See also: 12 9/40 as a decimal