What is 21 89/20 as an improper fraction?

The mixed number 21 89/20 written as an improper fraction is 509/20

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Convert 21 89/20 as an improper fraction

To turn the mixed number 21 89/20 into an improper fraction, use these simple steps:

First, multiply the whole number by the denominator of the fractional part: 21 × 20 = 420.

After that, add the result to the numerator of the fractional part: 420 + 89 = 509.

Next, Write the sum of the previous step on the original denominator: 509/20.

21
89/20
=
21 × 20 + 89/20
=
509/20

This means that 21 89/20, as an improper fraction, equals 509/20.

See also: 21 89/20 as a decimal

Examples of decimal to fraction calculations