The mixed number 4 21/125 written as an improper fraction is 521/125
To turn the mixed number 4 21/125 into an improper fraction, use these simple steps:
First, multiply the whole number by the denominator of the fractional part: 4 × 125 = 500.
After that, add the result to the numerator of the fractional part: 500 + 21 = 521.
Next, Write the sum of the previous step on the original denominator: 521/125.
This means that 4 21/125, as an improper fraction, equals 521/125.
See also: 4 21/125 as a decimal