George baked a cake to share with his family. Jenny ate 15 of the cake and Brett ate 13 of the cake. How much of the cake did Jenny and Brett eat in all? Responses 215 of the cake 2 over 15 of the cake 28 of the cake 2 eighths of the cake 815 of the cake 8 over 15 of the cake 85 of the cake 8 fifths of the cake