What is 21 4/5 as an improper fraction?

The mixed number 21 4/5 written as an improper fraction is 109/5

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Convert 21 4/5 as an improper fraction

To turn the mixed number 21 4/5 into an improper fraction, use these simple steps:

First, multiply the whole number by the denominator of the fractional part: 21 × 5 = 105.

After that, add the result to the numerator of the fractional part: 105 + 4 = 109.

Next, Write the sum of the previous step on the original denominator: 109/5.

21
4/5
=
21 × 5 + 4/5
=
109/5

This means that 21 4/5, as an improper fraction, equals 109/5.

See also: 21 4/5 as a decimal

Examples of decimal to fraction calculations