The mixed number 21 90/25 written as an improper fraction is 615/25
To turn the mixed number 21 90/25 into an improper fraction, use these simple steps:
First, multiply the whole number by the denominator of the fractional part: 21 × 25 = 525.
After that, add the result to the numerator of the fractional part: 525 + 90 = 615.
Next, Write the sum of the previous step on the original denominator: 615/25.
This means that 21 90/25, as an improper fraction, equals 615/25.
See also: 21 90/25 as a decimal