Answer
$\frac{640}{5067}$ are Banana Republic
Work Step by Step
To determine what fraction of stores are Banana Republic you must first find the total number of stores represented by the graph.
$3400+640+1027=4040+1027=5067$
$\frac{part}{whole}$, so if there are 640 Banana Republic stores the fraction that are Banana Republic is $\frac{640}{5067}$