The mixed number 12 21/400 written as an improper fraction is 4821/400
To turn the mixed number 12 21/400 into an improper fraction, use these simple steps:
First, multiply the whole number by the denominator of the fractional part: 12 × 400 = 4800.
After that, add the result to the numerator of the fractional part: 4800 + 21 = 4821.
Next, Write the sum of the previous step on the original denominator: 4821/400.
This means that 12 21/400, as an improper fraction, equals 4821/400.
See also: 12 21/400 as a decimal