Just treat the whole number part as a whole number. In this case, just leave it first as -6. Let's proceed to converting 0.59 to fraction..
59/100 = 59/100 (no more simplest form)
So, using mixed fractions, the converted version is [tex]-6 \frac{59}{100} [/tex]
Using improper fractions, it is [tex] \frac{-659}{100} [/tex]
