The mixed number 21 1/2 written as an improper fraction is 43/2
To turn the mixed number 21 1/2 into an improper fraction, use these simple steps:
First, multiply the whole number by the denominator of the fractional part: 21 × 2 = 42.
After that, add the result to the numerator of the fractional part: 42 + 1 = 43.
Next, Write the sum of the previous step on the original denominator: 43/2.
This means that 21 1/2, as an improper fraction, equals 43/2.
See also: 21 1/2 as a decimal