Answer
There will be 70 stores in the Orlando area after the increase.
Work Step by Step
We can use the following guideline to solve this problem.
Current number of stores + Increase in the number of stores = Number of stores after the increase
So, 50 + 40% $\times$ 50 = Number of stores after the increase
50 + .4 $\times$ 50 = Number of stores after the increase
50 + 20 = Number of stores after the increase
70 = Number of stores after the increase
There will be 70 stores in the Orlando area after the increase.