Ah, I see. Something like ◔ "CIRCLE WITH UPPER RIGHT QUADRANT BLACK".
Someone requested something similar here [1], and someone else made it using CSS here [2]. As the article explains though, it would need to be used in text for the Unicode committee to accept it.
For etc, start here: http://unicode-search.net/unicode-namesearch.pl?term=fractio...
You can use "fraction slash" to make any fraction, using super/subscript numbers: ⁷⁄₃₃