The mixed number 21 4/5 written as an improper fraction is 109/5
To turn the mixed number 21 4/5 into an improper fraction, use these simple steps:
First, multiply the whole number by the denominator of the fractional part: 21 × 5 = 105.
After that, add the result to the numerator of the fractional part: 105 + 4 = 109.
Next, Write the sum of the previous step on the original denominator: 109/5.
This means that 21 4/5, as an improper fraction, equals 109/5.
See also: 21 4/5 as a decimal