Verified Answer :

Really simple!
 
as an improper fraction it would look like this:
\(\frac{821}{100}\)
When changing it to a mixed fraction:
We divide the numerator by the denominator and keep the whole number to the side and leave the remainder as the numerator

the mixed number will look like this:
\(8\frac{21}{100}\)

we know that

A mixed number is a number consisting of a whole number and a proper fraction

so

we have

\(8.21\)

\(8.21=8+0.21=8+\frac{21}{100}=8\frac{21}{100}\)

therefore

the answer is

\(8\frac{21}{100}\)