The mixed number 21 4/7 written as an improper fraction is 151/7
To turn the mixed number 21 4/7 into an improper fraction, use these simple steps:
First, multiply the whole number by the denominator of the fractional part: 21 × 7 = 147.
After that, add the result to the numerator of the fractional part: 147 + 4 = 151.
Next, Write the sum of the previous step on the original denominator: 151/7.
This means that 21 4/7, as an improper fraction, equals 151/7.
See also: 21 4/7 as a decimal