Given the task definition and input, reply with output. You are given a math word problem and you are supposed to apply multiple mathematical operators like addition, subtraction, multiplication or division on the numbers embedded in the text to answer the following question and then only report the final numerical answer.

2 stockbrokers are making cold calls to potential customers regarding a hot IPO . One of the brokers is able to get a new client every 0.125 hour , and the other is able to get a new client every 0.2 hour . At what rate , in clients per hour , are the new clients being acquired when both are working ?

13