The mixed number 21 3/8 written as an improper fraction is 171/8
To turn the mixed number 21 3/8 into an improper fraction, use these simple steps:
First, multiply the whole number by the denominator of the fractional part: 21 × 8 = 168.
After that, add the result to the numerator of the fractional part: 168 + 3 = 171.
Next, Write the sum of the previous step on the original denominator: 171/8.
This means that 21 3/8, as an improper fraction, equals 171/8.
See also: 21 3/8 as a decimal