16 ounces of dark chocolate. 2/5 of the chocolate was used to make frosting and the rest to make brownies. How much more chocolate did Mrs. Harrison using the brownies than in the frosting
16•2/5=6.4 6.4 ounces of chocolate for the frosting. 16-6.4=9.6 9.6 ounces of chocolate for the brownies. 9.6-6.4=3.2 3.2 ounces of chocolate for the brownies more than from the frosting. (I hope I understood your question right. I don't have good English)