Jerome and His Two Friends Are Planning on Fairly Dividing

Jerome and his two friends are planning on fairly dividing up a chocolate-vanilla-strawberry cake. The cake is a third chocolate, a third vanilla, and a third strawberry. Jerome values chocolate five times as much as strawberry, and he values strawberry four times as much as vanilla. According to Jerome, what percentage of the entire cake is represented by the piece shown below?

A) 12 %
B) 30 %
C) 50 %
D) 64 %
E) None of the above.