The mixed number 21 72/20 written as an improper fraction is 492/20
To turn the mixed number 21 72/20 into an improper fraction, use these simple steps:
First, multiply the whole number by the denominator of the fractional part: 21 × 20 = 420.
After that, add the result to the numerator of the fractional part: 420 + 72 = 492.
Next, Write the sum of the previous step on the original denominator: 492/20.
This means that 21 72/20, as an improper fraction, equals 492/20.
See also: 21 72/20 as a decimal