You have created two elements for a measurement, one of which represents the total number of employees (100-1), and one of which represents the total number of employees who possess a Masters Degree (100-2). Once you have selected the two elements they appear in the Formula box as [100-1] [100-2]. To calculate the percentage of employees with a Masters Degree, you must add the mathematical operators to the formula, which now appears as [100-2] / [100-1] * 100.