-- If you leave it in decimal form, then decimals can't be simplified,
and the simplest form is 0.06 .
-- If you write it as a fraction, it's 6/100 .
That can be simplified ... divide top and bottom by
their greatest common factor (2), and you have 3/50 .
I still think the decimal is a simpler form than the fraction.
But that's just my own personal taste.