If you were doing some basic arithmetic to figure out how much money to tip a server for good (15%) or excellent (20%) service in your head, what part of your brain would be most active?

Question

Quizplus · Accepted Answer

The parietal lobes, especially the intraparietal sulcus, are involved in numerical estimation and arithmetic, which would be engaged when calculating a tip percentage.

If You Were Doing Some Basic Arithmetic to Figure Out