The mixed number 12 90/100 written as an improper fraction is 1290/100
To turn the mixed number 12 90/100 into an improper fraction, use these simple steps:
First, multiply the whole number by the denominator of the fractional part: 12 × 100 = 1200.
After that, add the result to the numerator of the fractional part: 1200 + 90 = 1290.
Next, Write the sum of the previous step on the original denominator: 1290/100.
This means that 12 90/100, as an improper fraction, equals 1290/100.
See also: 12 90/100 as a decimal