Not exactly.

Let me clarify just a bit. In the example I am using the agent has already made 100 calls, so making 5 more would actually be 105 calls. So he would only be at 19%, still short of goal. In this actual example the agent would need to make sales on his next 7 calls in order to reach 20%. The difficulty I am having in coming up with a formula stems from the fact that every call adds to the overall total, so the number is very dynamic.

Thanks for your help so far.