It's really hard to write the number 8.2 in any simpler form.
If you're required to express it as a fraction, then you might need to
take a second to consider whether it's in simplest form before you
hand it over.
As a fraction, 8.2 is 82/10, or 8 and 2/10, or 8 and 1/5 .
8 and 1/5 is in simplest fraction form.
As a decimal, there's no simpler form for 8.2 .