I am given -0.335 (no degree sign)

I am told that the answer is -20 degrees 20 minutes 24 seconds.

If I convert -0.335 as a degree I get -0 degrees 20 minutes 6 seconds

If I change -0.335 to degrees I get -19.19408614 degrees then when I convert to Degrees minutes seconds, my answer is -19 degrees 11 minutes 38.71 seconds.

How do I have to approach this so that -0.335 turns into --20 degrees 20 minutes 24 seconds