How many pfennigs are in a groschen?

A groschen was the subdivision of the Austrian Schilling. 100 Groschen = 1 Schilling.

A pfennig was the subdivision of the German Mark. 100 Pfennigs = 1 Mark.

Both currencies no longer exist, and both Pfennigs and Groschen are worthless.

Since 2002 both Austria and German have used the Euro ('€') as currency.