The mixed number 4 21/400 written as an improper fraction is 1621/400
To turn the mixed number 4 21/400 into an improper fraction, use these simple steps:
First, multiply the whole number by the denominator of the fractional part: 4 × 400 = 1600.
After that, add the result to the numerator of the fractional part: 1600 + 21 = 1621.
Next, Write the sum of the previous step on the original denominator: 1621/400.
This means that 4 21/400, as an improper fraction, equals 1621/400.
See also: 4 21/400 as a decimal