A company has 120 employees, and 30% of them work in the sales department. The remaining employees are divided equally between the marketing and engineering departments. How many more employees does the sales department have than each of the other two departments?
First, let's find out how many employees work in the sales department:

Employees in sales = Total employees * Percentage in sales
                              = 120 * 0.3
                              = 36 employees

Now we can find out how many employees do not work in the sales department:

Employees not in sales = Total employees - Employees in sales
                                     = 120 - 36
                                     = 84 employees

Since the remaining employees are divided equally between the marketing and engineering departments, we can find out how many employees work in each of these departments:

Employees in marketing = Employees not in sales / 2
                                      = 84 / 2
                                      = 42 employees

Employees in engineering = Employees not in sales / 2
                                        = 84 / 2
                                        = 42 employees

Now we can calculate how many more employees the sales department has than each of the other two departments:

Difference = Employees in sales - Employees in marketing (or engineering)
                   = 36 - 42
                   = -6

So, the sales department has 6 fewer employees than each of the other two departments.